From The Document Foundation Wiki
- Screenshot context: allows to add screenshot to give context on the string. This is currently a work in progress which will be available soon.
- Context, flag, source sting location: will give you some context base on the source code. It may be helpful to read the strings located in the same file and have an overview of the dialog.
- Source string age: gives the age of the source string
- Translation file: gives the path of the translation file and the position of the string in the .po file.