Tools Bar
The Picture bar is displayed when you insert or select a picture in a sheet.
Image Filter Bar
This icon on the Image bar opens the Image Filter bar, where you can use various filters on the selected picture.
Graphics Mode
Lists view attributes for the selected graphic object. The embedded or linked graphic object in the current file will not be changed, only the view of the object.
Transparency
Specifies the transparency in the graphic object. Values from 0% (fully opaque) to +100% (fully transparent) are possible.
Crop
Allows to crop the display of an inserted picture. Only the display gets cropped, the inserted picture is not changed. A picture must be selected to enable cropping.
In Impress and Draw no dialogue is shown when you click the icon, but you see eight cropping handles. Open the context menu of a selected picture and choose Crop Picture, if you want to use the dialogue for cropping.
Drag any of the eight cropping handles to crop the picture.
Bring to Front
Moves the selected object to the top of the stacking order, so that it is in front of other objects.
Send to Back
Moves the selected object to the bottom of the stacking order, so that it is behind the other objects.