How to set up Huion H610 hotkeys on Linux Mint 17.2?

Question

Hotkeys

Hello.
There is a graphics tablet Huion H610.
OS: Linux Mint 17.2 Cinnamon x64, Linux Mint 17.2 XFCE x64 (based on Ubuntu 14.04 LTS). DIGImend kernel drivers
are used for work . Both systems use kernel 4.3.0-040300-lowlatency. Hotkeys (return back, etc.) work erratically. Tried to catch xev data : undo = keycode 64 (keysym 0xffe9, Alt_L) rubber = keycode 39 (keysym 0x73, s) [keycode 37 (keysym 0xffe3, Control_L)] pencil = keycode 82 (keysym 0xffad, KP_Subtract) [keycode 50 ( keysym 0xffe1, Shift_L)] zoom_in = keycode 86 (keysym 0xffab, KP_Add) Tried screenkey

:
undo = Alt + F4
rubber = Ctrl+s
pencil = ? (hieroglyph)
zoom_in = 20
Tried evtest :
pastebin.com/bPUKFQGK
undo:
Event: time 1448970629.917142, type 4 (EV_MSC), code 4 (MSC_SCAN), value 700e2
Event: time 1448970629.917142, type 1 (EV_KEY), code 56 (KEY_LEFTALT ), value 0
Event: time 1448970629.917142, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003d
Event: time 1448970629.917142, type 1 (EV_KEY), code 62 (KEY_F4), value 0
Event: time 1448970629.917142, --- ----------- SYN_REPORT ------------
rubber:
Event: time 1448970660.477008, type 4 (EV_MSC), code 4 (MSC_SCAN), value 700e0
Event: time 1448970660.477008, type 1 (EV_KEY), code 29 (KEY_LEFTCTRL), value 1
Event: time 1448970660.477008, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70016
Event: time 1448970660.477008, type 1 (EV_KEY), code 31 (KEY_S), value 1
Event: time 1448970660.477008, -------------- SYN_REPORT ------------
pencil:
Event: time 1448970752.420405, type 4 (EV_MSC ), code 4 (MSC_SCAN), value 700e1
Event: time 1448970752.420405, type 1 (EV_KEY), code 42 (KEY_LEFTSHIFT), value 0
Event: time 1448970752.420405, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70056
Event: time 1448970752.420405, type 1 (EV_KEY), code 74 (KEY_KPMINUS), value 0
Event: time 1448970752.420405, -------------- SYN_REPORT ------------
zoom_in :
Event: time 1448970776.828263, type 4 (EV_MSC), code 4 (MSC_SCAN), value 700e1
Event: time 1448970776.828263, type 1 (EV_KEY), code 42 (KEY_LEFTSHIFT), value 1
Event: time 1448970776.916268, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70057
Event: time 1448970776.916268, type 1 (EV_KEY), code 78 (KEY_KPPLUS), value 0
Event: time 1448970776.916268, -------------- SYN_REPORT ---- --------
As you can see from the log, the information returned by screenkey and evtest is identical with the exception that evtest shows technical data (which can be understood) about all keys.
As needed:
undo = Ctrl+Z
rubber = Shift+E
pencil = P
zoom_in = +
Thank you for your attention and help!