The File menu
The File submenu is shown below.

The options are described below.
Save
The first entry leads to the usual type of
Save box. You can gain quick access to this by pressing F3 (function
key 3) when the caret is positioned in the main window or in the info
palette.
All the file types that can be used for saving the image will be shown. By clicking on the appropriate button, you can change this. The button initially selected will be of the same type as the original file. If you are changing the filetype, then change it before you type in a filename, because changing the filetype will cause the filename to revert to the original name.
As usual saving can be accomplished by dragging the icon at the top to a disc window, or to another application.
Alternatively you can type in a file name and path and type Return or click on OK.
Function keys F1, F2 etc. allow the corresponding file type to be
selected from the keyboard.
Info
The next entry on the File menu displays a window of information about the current image. This can often be interesting. The info box is shown below.

This leads to a window allowing you to print
images.
Copies is the number of copies of the image to be printed.
Portrait and Landscape control the orientation of the image on the paper.
Scale X and Scale Y can be used to set the scale the image will be printed at.
Corner X and Y are the offset of the bottom left hand corner of the work space relative to the bottom left hand corner of the printer page. Normally you will not need to use these values, because the image can be more easily moved around the page by dragging with the pointer tool.
The Print icon will cause printing to start. To successfully print, you must have a printer driver installed on the icon bar. The name of the current printer will be displayed at the top of the window. The program will attempt to get the best results from your printer. Sometimes both the image and the printer will have much higher resolutions than the screen.
The Set icon will save the values in the window and close it without printing. It is possible to show the area that is available to print in the main window (see the View menu). When you click on Set this area will be updated. So you can adjust these values, click on Set and then position the image relative to the printer area. Usually you cannot print the entire page area - printers cannot work right up to the page edge.
TWAIN and Scanning
The next two items on the file menu are the standard TWAIN entries of Select source... and Acquire.... The first of these lets you choose the device you wish to acquire a new image from, the second lets you actually acquire it, via the TWAIN source dialogue box.
If you have used the rectangular selection tool, then the data source will be told that you only want it to supply an image covering that area.
More details of these options are given in the TWAIN page.
Page Size
The next entry on the file menu allows you to set the size of the
work space window. The top two items allow the orientation of the work
space to be set. The others allow a range of standard paper sizes to
be chosen. This menu may be familiar from the Draw program.
Undo and Redo
These two items will become available only after the image has been changed in some way. Undo allows you to go back to the previous version of the image. The number of available undo steps is set in Choices. Redo allows you to reinstate a change after you have 'undone' a change.
Undo and Redo are also available from the info palate. (see the main window page)