Add custom revision ids in Aras Innovator

Open Aras
Go to Administration -->Revision
Right click "New Revision.."
Enter any name: CustomPartRevision
Under Revisions, Provide values: 1 2 3 4 5 6 7 8 9 10 11
your wish
A1 A2 A3 A4 A5
Save.

Now map above revision to Part.

Go to Administration -->ItemType
Run
Select Part
Unlock
Under revisions
Select ...
Run
Select new one
Save

You can do same way for Document and other Items...