ubuntu 18.04 setting system comes with system screenshot shortcuts

0. Preface##

ubuntu 18.04 comes with a screenshot tool gnome-screenshot, there are three modes, full screen screenshot, screenshot of the current active window, screenshot of selected active area

1. Set shortcut keys#

Setting->Devices->Keyboard
At the bottom of the keyboard, there is a Custom Shortcuts that can be customized shortcuts.

Click the "+" sign, write the name at will, fill in the command with gnome-screenshot -a, and customize the shortcut key, so that every time you open, you will select the active window to take a screenshot

2. Mode selection#

Enter gnome-screenshot -h to view the user manual

$ gnome-screenshot -h
Usage:
 gnome-screenshot [OPTION…]

Help Options:-h,--help                     Show help options
 - - help-all                     Show all help options
 - - help-gapplication            Show GApplication options
 - - help-gtk                     Show GTK+ Options

Application Options:-c,--clipboard                Send the grab directly to the clipboard
 - w,--window                   Grab a window instead of the entire screen
 - a,--area                     Grab an area of the screen instead of the entire screen
 - b,--include-border           Include the window border with the screenshot
 - B,--remove-border            Remove the window border from the screenshot
 - p,--include-pointer          Include the pointer with the screenshot
 - d,--delay=seconds            Take screenshot after specified delay [in seconds]-e,--border-effect=effect     Effect to add to the border(shadow, border, vintage or none)-i,--interactive              Interactively set options
 - f,--file=filename            Save screenshot directly to this file
 - - version                      Print version information and exit
 - - display=DISPLAY              X display to use

You can see that there are parameters after gnome-screenshot,-the latter is a shorthand for the parameter, and the latter is the complete parameter

- c,--clipboard Send the grab directly to the clipboard
 - w,--window grab a window instead of the entire screen
 - a,--area grabs an area of the screen instead of the entire screen
 - b,--include-border contains the window border with the screenshot
 - B,--remove-border Remove the window border from the screenshot
 - p,--include-pointer contains the pointer with the screenshot
 - d,--delay=seconds at the specified delay[second]After taking a screenshot
 - e,--border-effect=effect The effect added to the border (shadow, border, retro or none)
 - i,--interactive Interactive setting options
 - f,--file=filename save the screenshot directly to this file
 - - version print version information and exit
 - - display=DISPLAY X display use