GeomLab commands
File Menu - not implemented
- Load ...
- Displays a dialog that allows you to choose a text file containing
expressions and definitions that is then loaded into GeomLab.
- Load session ...
- Displays a dialog that allows you to choose a file containing a saved
GeomLab session (extension .gls) to be loaded into GeomLab. When a saved
session is loaded, all definitions that have been made in the current session
are lost, unless you first saved the session in a file.
- Save session ...
- Displays a dialog that allows you to choose the name of a file (with
extension .gls); all the definitions in the current GeomLab session are saved
in the file, so that they can subsequently be re-loaded with
"Load session ...".
The '.gls' file that results cannot be opened with a normal text editor,
but the text of the definitions is not lost, and can be accessed again after
the file is loaded into GeomLab.
- Print image ...
- Displays a print dialog for sending the current image to a printer.
- Image setup ...
- Displays a dialog that allows you to choose the 'mean size' used for
subsequent "Save image ..." commands. When an image is saved, the width
and height of the image in pixels is chosen so that they have approximately
the right ratio to suit the picture, and so that the product of the width
and height is approximately the square of the mean size chosen here.
- Save image ...
- Displays a dialog that allows you to choose the name of a file; the
current image is then saved in the file in Portable Network Graphics ('.png')
format. This format can be displayed by all modern graphics programs and web
browsers.
- Exit
- Exits from GeomLab. All definitions that have not been saved are
lost.
Tools menu
- Evaluate expression
- Submits the expression currently in the bottom pane for evaluation by
GeomLab. Alternatively click on the "Go" button in the Input Panel.
- List defined names
- Pastes a list of all names that have been defined in the interpreter --
both those that are part of the GeomLab library, and those that have been defined during
the current session -- into the Output Panel.
- Find definition
- Before invoking this command, you should type a single name in
the Input Panel. The command finds the text that defines this name, and
inserts the text into the bottom pane in place of the name that you typed.
This definition can then be edited before submitting it to GeomLab again;
this is a good way to fix minor errors. Note that names that are
pre-defined do not have a defining text.
Options menu
-
Match brackets
- If this option is enabled, then each closing bracket
(either ')' or ']') that
is typed in the bottom pane highlights all the text back to the matching
opening bracket with a blue line.
If the brackets do not match properly,
or there are more closing than opening brackets, then the line appears in red
instead. This option makes it easier to type complicated expressions,
especially ones that end with a lot of closing brackets.
- Count reduction steps
- If this option is enabled, then GeomLab counts the number of 'reduction
steps' that are needed to evaluate each expression, and displays the total
together with the value of the expression.
- Use larger font
- This option increases the size of the text in the two panes of the
main GeomLab window.