Sara has asked a good question about using Eazy Hanger to align round picture frames.

Here is my recommendation.

Mark Top and Bottom centres on back of picture.

Place picture such that the two centre marks are at 90° to alignment jig (click to read my Eazy Hanger jig instructions).

Find a parallel spacer wide enough to move the top of the Eazy Hanger fully onto the picture.

Glue or screw fix Eazy Hanger.