Rotate 45 
rotates the selected block of objects in 45 degree steps around the Center of Rotation 
.
To rotate a block of objects freely on the canvas, see Rotate a Block of Objects.
To Rotate a Block of Objects by 45 Degrees
-
In the Draw Tab
of the Design Panel 
, click Rotate 45 
. -
Select the block of objects, then choose Draw > Rotate 45.
Undo to return to the previous angle.