Important: The settings in Preferences > Automatically Sized Substrates > FlexoPlate must already be configured. When this selection is used, the other Auto Sized Substrate options are cleared and inactive.
- Drag a new substrate from the ShopMap palette into the job. 
A warning appears:There is already a substrate in the job. Do you want to replace it? - Click Replace. 
The Create Plate dialog box appears. - In the Replace Plate dialog, perform these actions in the Height and Width area:
- If you do not want to accept the defaults, type the dimensions of the plate required.
 - In the Units list, select millimeters, centimeters, or inches.
 
 -  Click Yes.
The new flexo plate replaces the existing flexo plate on the layout. 
Note: If a Press has been attached to the substrate, there will be a warning message: Auto Flexo Plate selected, but a Press has been attached to substrate. All Press offsets will be ignored.