Shutter is my favorite tool for taking screenshots in Linux. You can take screenshots with it, and you can also edit screenshots or other images with it. It’s a nifty tool for adding arrows and text to the images.
You can also use it to resize images in Ubuntu or whichever Linux distribution you are using. Most of the screenshot tutorials (in the past) at It’s FOSS has been edited on Shutter.

Shutter has been a great tool so far, but its development was paused for several years.
Even simple bugs like editing mode being disabled in Shutter were starting to be an annoyance.
Perhaps this was the reason some Ubuntu releases dropped their packages. But, now it’s back!
Fortunately, it received an overhaul in 2021, and now you install it without any hassle.
Thanks to Linux Uprising, the official PPA for Ubuntu is now available as usual.
Installing Shutter on Ubuntu 20.04 or above

I hope you are familiar with concept of PPA. If not, I highly recommend reading my detailed guide to know more about what is PPA and how to use it.
Now, open a terminal and use the following commands to add the repo and refresh the repository list:
sudo add-apt-repository ppa:linuxuprising/shutter
sudo apt update
Once done, you can use the apt command to install Shutter:
sudo apt install shutter
That’s it. You should have Shutter screenshot tool installed. You can search for it in the menu and start from there.
Removing Shutter installed via the Official PPA
I’ll complete this tutorial by adding the steps to uninstall Shutter and remove the repository you added.
First, remove Shutter from your system:
sudo apt remove shutter
Next, remove the PPA from your list of repositories:
sudo add-apt-repository --remove ppa:linuxuprising/shutter
You may also want to take a look at Y PPA Manager, a tool for managing PPA graphically, if you require the need.
Instead using PPA, better look for another alternative, PPA’s are insecure.
For 21.04 and later, Shutter has an official ppa. Add it using `sudo apt-add-repository ppa:shutter`
Shtter is very nice, but, unless I miss something, it misses an essential feature for me: capture contextual menus (which disappear as soon as one goes to Shutter to select a rectangle on the screen).
The only utility I found which can capture these contextual menus is Kazam.
Never used Kazam for screenshot. THanks for the tip. I usually go with delayed screenshot when I need to capture menu items.
not able to add the PPA in ubuntu 21.04!