Parallel Insertions

Let's say I am inserting a square block into a dwg and want to get it parallel to an existing angled line. Do I have to read the angle of the line and insert the block to that angle or is there a quicker way?

Have you tried the Parallel OSNAP? I know that it is there but have been unsuccessful in trying to use it, so I use Polar tracking.

Try the ALIGN command after inserting. I use polar tracking as well.

Here's 4 more ways to rotate your block parallel to existing geometry

1) Use the [R]otate option during insert and pic the points to align the block with before you drop the block in the drawing

2) Drop the block in the drawing and use the Parallel or Perpendicular OSNAP to align the block with an existing object

3) Drop the block in the drawing, and then use the Rotate command with OSNAP tracking, or the [R]eference option

4) Make it a Dynamic block with an alignment parameter.

demo

http://screencast.com/t/jL5V5znv1zC

Set polar relative to last point. Insert block, pick an endpoint, nearpoint, etc. move your cursor to rotate block.

Rotate UCS to object, insert, etc...

Many thanks to all for your help:D

I would just insert the block at default rotation and then rotate it by reference to whatever angle I wanted it on.