The command shifts the content of the active layer. Anything shifted outside the layer boundary is cropped. This command displays a dialog which allows you to specify how much to shift the layer and how to fill the space that is left empty by shifting it.
You can access this command from the image menubar through → → ,
or by using the keyboard shortcut Shift+Ctrl+O.
Figure 15.126. The “Offset” dialog
Generic filters are a catch-all for filters which can't be placed elsewhere. You can find:
The Convolution Matrix filter which lets you build custom filters.
The Dilate filter.
The Erode filter.