Autocad 2020 - 21 crash course

user Interface

- Quick user interface

- On\off toggles

- Grid toggle

- Add toggle to status bar

1. lines (orthogonal)

2. mouse wheel (zoom - pan - zoom extents)

3. catch last drawn point

4. snap toggle(end point snap)

5. line snap to end point

1. lines (Inclined)

2. Length_Angle lines

3. ΔX_ΔY lines

4. Close option in line command

• Object snap adjustment

• Repeat last command

• Save + Save As

-Open file

-Show ribbon

-Close ribbon

-Deactivate active command

-Select objects by clicking(select one by one)

-Mirror objects (erase source object)

-Mirror objects (with out erasing source object)

-Select a default option in a command

-Erase objects.

-Undo commands.

-Difference between Undo command and undo option in a command.

- Window selection.

- Cross selection.

- Window lasso selection.

- Cross lasso selection.

- Switch cross lasso to window lasso to fence lasso.

Hi!

In the next few lessons, we will use two important commands. Trim command and extend command. The problem you may face using them that the way they work has changed since the release autocad 2021. So, what we will do now ...

For users of recent releases, we will first explain how to change the command so that it works as version 2020 and earlier. Then we give some examples using autocad 2020 explaining the old way of the two commands. After that, we return to the new release explaining the new way of the two commands. This way everyone knows how to use the commands, whatever version he uses

So now if your version is newer than autocad 2020 use the system variable TRIMEXTENDMODE to make it work like 2020 and earlier versions…. Let’s see how

-Trim

-Show UCS Icon at origin

-Extend

- AutoCAD OPtions.

- Change color theme.

- Change background color of 2D model space.

- Circle (center point + radius).

- REgenerate model.

- Circle (center point + diameter).

- Move.

- COpy.

- Difference between Move and COpy.

- TRim (select all).

- Change layer color.

- Layer properties manager dialogue box.

- Add new layer.

- Accept default name or change it.

- Load line types.

- Attach line type to a layer.

- Set your new layer as a current layer.

- Stretch line using grips only.

- Change line weight of layer.

- Show / Hide line weight toggle.

- Rename layer.

- Arc (Center, Start, End.)

- Change layer of a drawn object.

• Control overall line type scale using system variable LTS

• Control line type scale of a certain object (not all objects in drawing) using object properties

• knowing some benefits of layers

• turn layers on/off (hiding objects on the layer)

• hiding layers by selecting any object on it

• turn all layers on

• Warning...be careful when turning current layer off

• lock a layer (keep layer from modify by mistake)

• unlock a layer

• lock\unlock multiple layers by selecting any object on the layer

• Drawing Circles without knowing its center point

• circle 2 points

• circle tangent tangent radius

• circle tangent tangent tangent

• circle 3 points

• Drawing circle with specific area

• Drawing circle with specific circumference

• Convert Trim to Extend

• extend while you are still in trim command

• trim while you are still in extend command

• use trim or extend without selecting cutting edges or boundary edges(select all)

• · What is the fillet.

• · Fillet command.

• · Never forget to read fillet settings before applying the command.

• · Change fillet radius.

• · Multiple option in the command.

• locate fillet position using selection points.

• Draw fillets with different radii using only one fillet command.

• Trim doesn't  only trim it extends also

• What does No Trim option do in fillet command

• Zoom window

• Connecting lines using fillet command.

• The power of shift key  on fillet command(change radius to zero).

• What is chamfer.

• What is chamfer distance.

• Change chamfer distance.

• Which line to choose first and which to choose second.

• CHA shortcut.

• · Effect of selection point

• · Multiple option in chamfer command

• · Use shift with chamfer command

• · Chamfer command is used to connect two lines (no circles or arcs)

• · Chamfer command is used to connect two lines

• · Chamfer by distance and angle

• · Chamfer mEthod

Hi

In this lecture we will discuss few notes about chamfer command

First activate chamfer command

Write cha … press spacebar or enter

Now dist1 is 20 and dist2 is 10

So, if you select horizontal line in the right side of it and select vertical line in the upward side of it

The chamfer line is drawn between right and upward sides

Undo

activate chamfer command again

If you select left part and downward part of lines

The chamfer line is drawn between left and downward sides

activate chamfer command again

write m and press spacebar or enter to activate multiple option …

while you selecting lines press shift to turn distance to zero

you can use this method to connect lines as I do now

…..

…..

…..

Let’s discuss another note

Chamfer command is used to connect two lines

If you activate the command and select circle or arc

Autocad tells you that

Chamfer requires 2 lines (not arc segments).

Another note

Some times in drawings chamfer is given by distance and angle

Like this chamfer of distance 50 and angle 30

To draw that chamfer

Activate chamfer command

Write A and press spacebar to activate angle option

Autocad asks you to

Specify chamfer length on the first line

Write 50 and press spacebar

Autocad asks you to

Specify chamfer angle from the first line

Write 30 and press spacebar

Select first the line you want with distance 50

Then select the second line

…

…

Another note

If you activate chamfer command and the active method is distance and angle

If you activate distance option now you should enter dist1 and dist2

But if you just want to change the method to the last saved distance

Just write E to activate method option and select the method you want

…

…

Thank you

HI

In a previous lesson

I asked student’s using autocad release newer than 2020

to turn TRIMEXTENDMODE system variable to zero

to learn how the commands trim and extend works in release 2020 and older releases.

In this lesson

we are going to turn this system variable to 1

to learn how the two commands works in newer releases.

So, if your release is newer than 2020

let’s see how to turn this system variable to 1

• · What is standard mode and quick mode of trim and extend commands

• · You don’t have to select cutting edge first like in standard mode

• · Now trim erases objects

• · Selecting objects trims it to the nearest intersection points

• · Curved fence line selection

• · Straight fence line selection

• · YOU have the option to select cutting edges if you want

Hi

Some quick review

The way trim and extend commands work in version 2020 and previous versions is called now STANDARD mode

And The way they work since version 2021 is called now QUICK mode

In previous lessons we learned how to switch AutoCAD between the two modes using system variable TRIMEXTENDMODE

If you turn this system variable into zero you are in standard mode. If you turn it into 1 you are in quick mode

We discuss some examples using standard mode to learn how the commands work in it

In this lesson… we will learn how trim command works in quick mode

So, let’s go to AutoCAD

In AutoCAD if we draw some circles and lines

Activate trim command

Write tr and press spacebar or enter

First …. check the mode is quick

First difference you notice…

AutoCAD asks you to select objects to trim first

You don’t have to select cutting edge first … like in standard mode

Second difference…

If you select an object doesn’t intersect with any other object or intersects at its end points…. Trim command will erase it….that wasn’t happening in standard mode.

Undo… activate trim command again

If you select any object intersects with other objects

AutoCAD trims it to the nearest intersection points

Undo… activate trim command again

If you left click any where on the screen and hold the mouse button down moving the mouse across the screen…

You are drawing a curved fence line that selects any object it passes through to be trimmed

Undo… activate trim command again

If you left click any where on the screen without holding the mouse button down and left click any other where in the screen …

You are drawing a straight fence line that selects any object it passes through to be trimmed

Undo… activate trim command again

You have the option to select cutting edges if you want

To activate cutting edges option…

Click it in command line or just write t and press spacebar or enter

AutoCAD asks you to select cutting edges

Select the objects you want to work as cutting edges

To end selection press spacebar or enter or right click the mouse

Then select the objects you want to be trimmed

Thank you

• · You don’t have to select boundary edge first like in standard mode

• · Effect of Selection point of objects

• · Straight fence line selection

• · Curved fence line selection

• · YOU have the option to select Boundary edges if you want

• · Make AutoCAD repeat commands automatically

• · Get points directly by tracking

Hi

In this lesson…

We will draw This simple drawing again

But in a different way

To learn some new commands

The first new thing we will learn is

How to make AutoCAD repeat commands automatically

With out the need to repeat them by ourselves

Assume we want AutoCAD to repeat the command circle

So, we use the command multiple

Just write mu

And select multiple from the menu

AutoCAD asks you to …..Enter command name to repeat

Write c and press spacebar

AutoCAD keeps repeating circle command and will not stop tell you press scape

The second new thing we will learn

Is how to make AutoCAD track points across the screen

For example

To draw this drawing

We can make AutoCAD track points and draw the circles in its right location at first place

Using track option

To understand what I mean

Let’s start drawing

Activate multiple command

Write c then press spacebar to repeat circle command

Draw first circle at any point on the screen

To locate second circle… center … use track option

To activate track option, write tk and press spacebar

AutoCAD asks you for …… First tracking point

Click in the center of first circle and move the mouse in the direction you want

Write 150 and press spacebar

AutoCAD asks you for … Next point ……to keep tracking

To finish tracking press spacebar then enter the radius of 125 and press spacebar

Repeat the tracking option to draw the third circle

Press scape to finish multiple command

Trim the extra parts to finish drawing

Thank you

• · Draw rectangle as polyline when dynamic input is on

• · Draw rectangle as polyline when dynamic input is off

• · Polyline is a single object

• · Stretch and keep shape.

• · Polyline option in modify commands