Troubleshoot aligning and arranging drawing objects
From Microsoft Graph
Depending on the alignment option you click, objects will move straight up, down, left, or right and might cover an object already there. You can undo the alignment with the Undo command (Edit menu) and move the drawing objects to new positions before you align them.
Items on the Align or Distribute menu are dimmed, and I can't select them.
You must select at least two drawing objects to make the alignment options available and at least three objects to make the distribution options available.