Select rectangle issues

[system]

Hi,
This could be very simple solution but when i hold down control+shift my green selections arrow shows but when i let go of the shift button i don’t get the red selection as i should.

Thanks in advance.

[marcus_civis]

You release Ctrl+Shift and then press Alt.

See 6.8 here:http://docs.pixologic.com/user-guide/keyboard-shortcuts/shortcuts-by-category/

[system]

Thank you so much!