To user "TwoLeftThumbs", regarding capturing an area of the screen: Almost all of the good screen capture programs can capture an "area" of the screen (usually rectangular) without having to first capture the entire desktop and editing that. You might first have to hit the print screen key, then select the capture option like "Rectangular Region", or if that screenshot application has a shortcut key combo for capturing a screen area then use that. "Shutter" is probably the best screenshot application available, and it can easily do that. "Shutter" is in the Software manager or Synaptic Package Manager (SPM). In my Linux Mint KDE 17.3 system the "Ksnapshot" program does this, and the new very nice Linux Mint 18 KDE screenshot application "Spectacle" also does this.
Tip: if you are trying to capture a screenshot of a "pop-up", "Fly-out", or right click menu, mouse over message, then you can use the "Delay" option that most good screen capture application programs have. Set the "Delay" to something like 7 seconds, click take new screenshot, then go to or bring up the menu, pop-up, mouse over, fly-out, or right click menu, that you are interested in capturing, and just wait for the screen capture timer to take the screen shot. "Shutter" also has an option to capture menu items. Obviously, you cannot use the select an area option to capture these type of screenshots because if you move your mouse, then these disappear or change, so you have to capture the entire desktop (usually), then edit it if you only want a portion of it.
Tip2: There are some excellent easy to use image editors for cropping portions of images, and many other image editing tasks, like "Kolourpaint", Pinta, gpaint, mypaint, etc...
To user "InkKnife":
InkKnife wrote:The only application I miss from OSX is called GraphicConverter. The best, most powerful and easiest to use graphics utility on any platform.
That looks like a really nice paid for application. But, there are numerous excellent Linux graphics tools available that can do the same things. You might have to use more than one tool to accomplish your final results, but it can certainly be done.
"Converseen" in the Software manager or Synaptic Package Manager (SPM) is an excellent tool for easily and quickly converting images into other image formats. It can also be used to easily shrink (scale down) images and save them into a smaller compressed image format like ".jpg (jpeg)" for uploading into this forum's currently and extremely limited image size of less than 98kb.
There are also multi-functional graphics browsers and editors like "Gwenview", "XnViewMP, DigiKam, showFoto, Pix, gThumb, gnome-photos, Phatch, PhotoQT, Shotwell, gPhoto or gPhoto2, KPhotoAlbum, gtkRawGallery, Gallery-App (gallery-uploader), Photofloat, etc.... Gimp (of course and all the plugins), Photivo, DigiKam, etc...PhotoPrint. (more web stuff: album, FGallery, imageIndex, Jigl, PhotoFloat, etc...). These are certainly worth trying and using.
Photivo (can be installed using PPA below)
Dariusz Duma - Every photographer needs some tools... Adding this PPA to your system
https://launchpad.net/%7Edhor/+archive/ ... x?batch=75
VIP Note: Below is a great PPA for many great photography and image applications, but I have had issues with this PPA trying to install a version of FFmpeg that wanted to remove many other programs that I wanted to keep; in Mint versions 17.3 or less, have not been using version 18 long enough to know if this is still an issue. So, after installing all the applications you want from this PPA (see the link below for all the available software in this PPA and their names), making sure during installing any of these that it does not remove anything you want to keep, then you might want to disable this PPA, or remember to not install FFmpeg from this PPA.
To install this using the PPA method, open a console terminal, type in, or copy & paste, each line below one by one:
sudo add-apt-repository ppa:dhor/myway
sudo apt-get update
sudo apt-get install EnterInPackageName (example like photivo or photocollage, gimp-beautify, etc...)
Note: a lot of these applications and screen capture programs can also upload to various online image hosting websites as well.
Hope this helps ...