For April, Harry's picks include the following:

Adjust Dimension Text Masking — Michael Partenheimer — When you enable text masking on a dimension in AutoCAD, it’s named Fill Color in the Properties dialog. There is no way to change the masking factor, however, to enlarge or reduce the amount of masking applied — until now. 

Draw Chain — Jay Thomas — Jay returns with a creative AutoCAD routine that draws chain. This routine includes a dialog box, slide library, and several drawings.

Rotate Text to Match View — Tommy Shumpert —  If you work with UCS rotated views in AutoCAD, you may run across text and/or mtext entities whose rotation angle is just a bit off for one reason or another. This routine will set the selected text to zero (0) rotation regardless of the current view angle. 

Perform Multiple Fillets with Radius Zero — Kent Cooper — This tip is an update to an AutoCAD tip submitted more than a decade ago. The original tip allowed you to perform a single fillet with radius zero, after which it restored the original radius value to the built-in Fillet command. Kent’s version allows for the same functionality, except you can perform as many fillets as you need with a zero radius. 

Convert Regular Polygons to Circles — Kent Cooper — This AutoCAD routine from Kent Cooper is pretty specialized, but if you can use it, it will undoubtedly save you a lot of time. It converts regular polygons to circles. What is a regular polygon, you ask? It's a polygon whose sides are all equal in length and whose vertices are equidistant from the center.

Create a Circle Tangent to Three Entities — Kent Cooper — The third AutoCAD routine from the prolific Kent Cooper allows you to construct a circle tangent to three objects. It uses the Circle command's 3P option along with the Tangent object snap, but streamlines these into a nice command.