To change the size of a visual part:
Before you release the mouse button, an outline of the part is displayed to show you the new size of the part.
You can also resize a part one pixel at a time:
To resize a part vertically, use the selection handle in the middle of the top or bottom edge of the part or use Shift + the up arrow or down arrow keys.
To resize a part horizontally, use the selection handle in the middle of the left or right edge of the part or use Shift + the left or right arrow keys.
To resize a part both vertically and horizontally proportionally at the same time, use the selection handles at the corners of the part.
If you want a part to size to the coordinates of the grid, from the Options menu, select Snap on size.
You can also use the framingSpec property in the part's Properties window to size and align the parts automatically when the window size changes.
If you start to resize a part and then decide you want to leave it as it was, press Esc before releasing the mouse button.