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Vector for Psion 3a/3c & Siena
Program Settings Snap and the Grid
The Snap & grid option on the Settings menu brings up a dialog that creates an imaginary grid that covers the drawing. Set the horizontal and vertical distance between the grid lines with the Spacing entry. Set Snap On to constrain the cursor to the grid intersection points. Black or grey dots show the intersection points when the grid display is On. You can control the number of dots displayed by using the Show minor and Show major entries. The Info window will show the current Snap setting (which will be the spacing setting if snap is on) and the grid setting (which is the distance between the minor dots) as the S: and G: values.

Use the single keys "S" and "G" to toggle Snap and the Grid display On and Off.

When Snap is On, the only time the cursor moves off the grid is immediately following a Jump command. The next time the cursor moves, it will snap back onto the grid.

Note that if the grid dots are so close together that they would obliterate the drawing, the program will override the setting and double or more the distance. The Snap setting never changes though.

Layers
A Vector drawing can have up to 16 layers, nominally named A to P, although you may give them additional names. Access the Layers dialog box from the Layers option on the Settings menu. Use this dialog to name the layers, toggle the display of layers on or off and select the current drawing layer. The current layer is the layer used when creating new drawing elements. Note that when the current layer is selected, it will automatically be switched On.

The Info window shows all the layers that are switched On by letter, with the current layer highlighted. The 3a/3c version also shows the current layer's name.

Text Styles
You can use the Settings Text style option to select the text style used with the Drawing Text command. You may also use it to maintain the list of styles. Each style sets the font, size, drawing angle and can be given a name (up to 15 characters). The Info window shows the current text style name.

Keyboard Map
Most of the menu, sub menu commands and more can be set to use single key presses. Use the "Preferences, Keyboard" option to assign actions to keys. By default, single key presses can access the following functions

  1. Jump to X,Y
  2. Zoom to box
  3. Zoom to Extent
  4. Toggle Grid
  5. Toggle Info window
  6. Jump relative to Last Enter pt, X,Y
  7. Jump relative to Cursor (Polar)
  8. Toggle Quick draw
  9. Jump relative to Cursor (X,Y)
  10. Toggle Snap
  11. Zoom Out
  12. Zoom In
Apart from G, I, Q and S, these are identical to the Menu options.

The keyboard map is saved in a separate configuration file, not as other settings, with the drawing file.

The main Arrow key functions can be changed with the "Preferences, Movement" option, as described in the Arrow Keys section.

Quick Draw
Text and Symbols linked to an external library can slow down the redrawing of the screen as you move around. Toggling the Quick draw option On can speed this up by displaying the text and symbols as rectangles which mark their boundary.

The Quick draw option is only available as a Single key function, and is assigned the "Q" key by default. It is always switched Off whenever a new or different drawing is opened.

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