Sheet processing apparatus, method for controlling sheet processing apparatus, and storage medium

A control method for controlling a sheet processing apparatus, the control method comprising:

• performing a binding process for binding a plurality of sheets without use of a staple by a binding unit;
• setting a sheet on which a concave and convex mark is to be formed by the binding unit;
• and
• controlling the binding unit so as to form the concave and convex mark on the set sheet.

A computer readable storage medium for storing a computer program for controlling a sheet processing apparatus, the computer program comprising:

• a code to perform a binding process for binding a plurality of sheets without use of a staple by a binding unit;
• a code to set a sheet on which a concave and convex mark is to be formed by the binding unit;
• and
• a code to control the binding unit so as to form the concave and convex mark on the set sheet.