(my settings or comments are in between parenthsis) Get a good running OSNAP setting (OSMODE 3, ENDpoint + MIDpoint) for this simple demonstration. Draw a rectangle (0,0, 6,3) Zoom Extents (double-click on mouse wheel) ZOOM .75xp (just to see better) CIRCLERAD 0.5 CIRCLE... and do not hit the spacebar or enter (command alias C) and then simply hold down the spacebar (repeats the Circle command, prompting for Center) now get near the rectangle, when you see a osnap marker light up select (left-click)... yes while holding down the spacebar (or enter key). If you miss, simply select the offending circle, select the center grip (make it hot) and then move (grip edit stretch, but stretching a circle's center actually moves) to the right spot. BONUS TIP: Hold down the DEL key (or issue ERASE, command alias E and lean on the spacebar) and pick objects to delete... badda-bing! Extra Bonus TIP: This works with POINTS (command alias PO)... What else is this useful for? What are the pros/cons?