Fun with icons
Changing the appearance of windows won’t affect the appearance of system icons and your mouse cursor. Fortunately, the Gnome Look website ( www.gnome-look.org) has a huge number to choose from. You can install new icons and cursors in much the same way as for application themes. First open your home folder, right-click anywhere inside the window and choose to create a New Folder named .icons. Despite the name, both icon and cursor sets are stored here.
Next, download your chosen icon and/or cursor pack and extract it to the new folder that you just created. Use Ctrl+H to view the hidden .icons folder if you can’t see it. Close and relaunch the GnomeTweaksTool if necessary, then go to Appearance. Your new icon theme and cursor will appear in the respective drop down menus. When it comes to icons, bear in mind that not all packs are created equal: there may not be a custom icon for certain programs or folders on your system. Similarly, certain cursor packs may not have images for every single scenario, such as scrolling or resizing windows.
Take some time to experiment to find one that’s suitable for you. Some icon or cursor sets may be designed for specific GTK+ or desktop themes. Make sure to read the description carefully before installing.