Clicking on the relevant tab activates the displays for start or end values. You can change the values indicated in the entry field for scaling in direction x and direction y. If you want to scale proportionally, the values for both axes must be identical.

Selecting this button opens the Scale dialog box you are already familiar with. The relevant values (start or end value) are displayed. You can alter these values in this dialog box.

Clicking OK returns you to the original scale dialog box. The new values you entered in the Scale dialog box are now indicated here.

When creating the animation using the dialog box, the point in the drawing where you clicked is used as the center point. If you click anywhere on the drawing sheet a center point is generated at this point.

Clicking on the center button opens the following dialog box:

You can specify the coordinate values for the center point of scaling here. As the x and y coordinates have their origin at the bottom left of the drawing sheet, you can specify the center point precisely.