Problem
Need align Movie Clip to left, right, top and bottom of the stage.
Solution
Using dot to align movie clip to the left and top. And using stage.Width and stage.Height to align movie clip to the right and bottom.
Detailed explanation
//box_mc.x=0; // left aligning
//box_mc.y=0; // top aligning
box_mc.x=stage.stageWidth-box_mc.width;// right aligning
box_mc.y=stage.stageHeight-box_mc.height;// bottom aligning

This technic will be helpful if you need align your movie clipt to right+bottom of the stage and if you will change your stage size your movie clip will be on corner all time.
Source in attached files.
Source:
aligningMC
Thank you for reading.
