The Cursor Plotting submenu provides a fully interactive way of adding line plots and text to an image stored in a buffer. Location of points, lines, text etc. is through an on-screen cursor. Data may alternately be taken from a plot file using [R Read plot data from file].
By specifying the start location, centre of the arc and angle, an arc may be drawn. Note that arcs are drawn as circular in the physical space on the monitor; this does not correspond to circular in the pixel coordinates.
This option allows you to change between buffers without leaving the cursor plotting menu.
This option is similar to [F Fill bounded region] below, except that instead of filling a region with a given intensity, it allows the region to be duplicated from one position on the screen to another on the same or a different buffer. The routine will function correctly even if the source and destination regions overlap on the same buffer.
This option allows you to fill a region bounded by a specific threshold. After positioning the cursor within the region, the threshold value is prompted for. All parts of the region connected to the cursor position will be filled with a specified value.
This option provides simple access to the cursor submenu allowing the plotting of individual points and rubber bands. Additional information is available from the [H Help] option within the submenu.
This option allows plots to be created using data stored in a file. In ddition to data, the plot file may contain commands. For more details on this format, use the <f1> help facility once the [R Read plot data from file] option has been chosen.
Text may be added to the plot using this option. A wide variety of fonts and sizes are available through a submenu. The text may be 'dragged' around using the cursor controls, until it is positioned in the desired location.
This option allows you to move a window from one location to another. The source and destination need not be in the same buffer. Note that if a section of the destination window falls outside the limits of the screen buffer, then that region will be lost. The window may be enlarged or reduced in the horizontal and vertical directions, flipped in the horizontal and/or vertical, and/or transposed as required. Transposing the image does not preserve aspect ratio (the aspect ratio can be preserved, however, by an appropriate horizontal and vertical scaling).
This option is designed to enable windows to be copied with linear interpolation if expansion takes place.
This option is designed to enable windows to be expanded by a factor of two in either direction. This expansion applies a countour-based algorithm which leads to more pleasing images if expanded by a large amount.