Objects creation and modification	Modifying existing objects
Resizing or reshaping objects
Overview     Operations     Commands

How to shear objects on the Y axis  (fixed X axis) in assonometric mode  

1. Click on the menu Modify Shear axis... Shear Y axis (assonometric).
2. Select an object to tilt and press ENTER.
3. Specify the base point on the X (fixed).
4. Specify the tilting angle or a tilting reference point.

 Modify toolbar 

 Command line: SHEAR_X_A