Hi,
I assume you use MachScreen from my web-site (
http://www.kd-dietz.de/). When Machscreen is started, use menu File -> Open File, go to Mach3 install path (c:\Mach if you used Mach3 default install settings) select the set-file name and click open. You should see now page 1 from the set-file and the properties dialog-box. Before you go further, please make sure the most right icon of the toolbar is showing "1", if not change it by clicking at "M". Select the DRO you want to change the size by clicking at it with the left mouse button. The selected element has sizing squares. Take one square with the left mouse button and hold the button down. Moving the mouse changes the size of the element. After sizing the element save the set-file. This can be done by either using the icon in the toolbar, or the menu File -> Save File. Reload the set-file in Mach3.
Klaus