I have my cinnamon bar with tray icons (skype, pidgin, dropbox) next to cinnamon ones. I'd like to replace them with my own icons so that they have similar design to those remaining.
Where should I look for icons for pidgin, skype and dropbox?
Where to search for icons
You can look for icons at http://www.iconfinder.com:
Add an application to cinnamon panel
Next I will explain how to add Pidgin to the cinnamon panel bar and how to change its icon.
Let say that your cinnamon panel bar looks something like in the following image in this moment:
To add Pidgin in the panel par, go to Menu and search for "Pidgin". When it found, right click on it and select Add to panel:
So now your panel bar it looks like this:
Change the icon for an application
Let say that you want to change the default icon for Pidgin to the following:
To change the icon for Pidgin, go to Menu search for "Main menu" and open it. When it open, search for "Pidgin" application, click Properties and change the icon by clicking on it:
So, finally, your panel bar it looks like this:
Moreover, you can move an application anywhere you want on the panel by right clicking on the panel and selecting Panel Edit mode. Now you can drag and drop your application anywhere you want on the panel: