The bitmap can occupy part or all of the emulation window. Likewise, it can show all or part of the bitmap s contents. These factors are controlled using two rectangles. The combination of these factors allows various zooming and panning, as explained following. It is also a rectangle in units of pixels, based on the top left corner of the picture.
Similar logic applies in the vertical dimension.
To ensure consistent operation, the host program may need to issue a FONT command, to tell AnzioWin to display its text in a particular size in dots. If AnzioWin s font size is too large to fit the required number of rows and columns on the screen, AnzioWin will add scroll bars to the window so the user can scroll around in order to see everything. The bitmap will be scrolled appropriately so as to maintain its position relative to the text. If the window contains scroll bars, the entire virtual window will be printed. An example of where the bitmap might be used is to display an employee picture.