How to sum the area of multiple hatches ?
To find the area of multiple hatches in your drawing, just select those hatches, and check the Cumulative Area in the Properties panel
Undo Command in CAD
Just like using other software, you can undo what you’ve done.
SETBYLAYER command
If you have received nonstandard drawings, in which many object properties are not set to bylayer, which makes it hard to edit and control your drawing, then try SETBYLAYER.
How do you make a circle thicker？
Can you edit circle to change line thickness?
Small tip: How to convert an arc into a full circle ?
This can be done using the JOIN command.
How to change the placement of an arc symbol in Arc length dimension ?
As is known, the arc length dimension displays an arc symbol to differentiate itself from Linear or Angular dimensions.