1. How to select an object under another object?
1st way: There is a very simple way. Press Ctrl button when you select object. Click on object until you is selected, you press Space button (enter or right).
2nd way: You can use Layoff command to turn off other layers.
3rd way: You can also use Draworder command to order above objects.
2. How to use Osnap feature quickly?
You are turning on a lot of Osnap options. So when you drag mouse to near the object, AutoCAD snap incorrectly? This case, you can press Shift key on the keyboard and click right mouse simultaneously. Next, you use shortcut such as: Endpoint(E), Midpoint(M), Intersection(I), Center(C), Nearest(R), Perpendicular(P), Node(D), Quadrant(Q), Extension(X), Insertion(S), Tangent(G), Apparent intersection(A), Parallel(L).
3. How to locate a point between two other points?
You want to specify a point that is the midpoint of 2 other point without any object to catch midpoint. For beginner, they will draw a line passing through 2 points and select midpoint, then go back to delete this line. AutoCAD supplys all users with Mid Between 2 points feature. Now you only need to press Shift key on the keyboard and click on the right mouse simultaneously. AutoCAD will show all Osnap options and you select Mid Between 2 Point option. ACAD will ask you first point of mid and second point of mid.
4. Edit Text, Mtext or Text of dimension
Some people still use way Click double Object. ACAD supplys you with DDEDIT command. You should use this command. Because it gives most effective, specially applied with Dimension.
5. Order Object
If the drawing has two lines overlap how to give one of two lines that show up before or after. Example: a red line on top of the blue line how green lines show up before. Tools -> Display order -> Bring to front -> Select blue line -> Enter.
6. Modify Shortcut command
Tools -> Customize -> Edit Program Parameters -> Modify necessary shortcut commands -> Save this file > Close -> Restart AutoCAD or you can use Reinit command
Express -> Tools -> Command Alias Editor -> Show a shortcut command table
7. Line to Polyline
You can use Pedit command as following:
PEDIT Select polyline or [Multiple]: M
Select objects: Specify opposite corner: 11 found
Enter an option [Close/Open/Join/Width/Fit/Spline/Decurve/Ltype gen/Undo]: J
Join Type = Extend
Enter fuzz distance or [Jointype] : 5.0
10 segments added to polyline
Enter an option [Close/Open/Join/Width/Fit/Spline/Decurve/Ltype gen/Undo]:
8. Change the direction of the arrow size
Besides controlling in the Dimension Style Manager. You can change the direction of the arrow as following: Choose Dimension -> Click on right mouse -> Flip arrow.
9. Add your photos to AutoCAD
(1) You insert images into Word and then copy the image from Word to paste AutoCAD
(2) Change your photos into a format(.bmp). Then on ACAD, Insert -> OLE Object and then use the Create from File to insert images.