A tree image can be exported to a raster format (.png, .jpg, .bmp, etc.) or to a vector format (.svg).
Select either the Export Tree Image toolbar button or the Actions ‣ Export Tree Image item in the main menu.
In the submenu that appeared select the Save visible area to file... item to save the tree image to a raster format. The standard Save As dialog will appear where you can select the file name and format.
To export a tree image to a vector format select the Save whole tree as SVG item in the Export Tree Image submenu.
To copy a tree to the clipboard select the Copy to clipboard submenu.