Solution : https://service.sap.com/sap/support/notes/407258 (SAP Service marketplace login required)
Key words : 
visual design incomplete citrix terminal server reason, sap gui fast enoughb, terms hard copy sapgui, -> hard copy option dialog, windows terminal servers, hard copy function, visual design, citrix servers, graphics card, screen display
Related Notes : 
       
| 627753 | Keyboard: Hot key Ctrl+Shift+P for hardcopy supported |