"Let's model me a mine"
M.E.G.M.S.
Mining & Exploration Geological Modelling Services
Use this command to change the current insert mode, from Overwrite to Insert, or vice versa.
When moving unit boundaries the insert mode determines what happens with the boundaries for units further down the hole.
When the Insert Mode is "Insert", the boundaries for lower units are moved up and down to accomodate any boundary changes. The thickness of the unit immediately below the boundary being edited does not change.
When the Insert Mode is "Overwrite", the boundaries for lower units do not move. Instead, the thickness of the unit immediately below the boundary being changed is adjusted.
When the Insert Mode is insert, the Insert Mode menu item on the Edit menu will be checked. The status bar also indicates the current insert mode, displaying "INS" for "Insert" mode and "OVR" for "Overwrite" mode.
You can use the Insert key as a shortcut for this command.
When editing boreholes using the mouse you can change the Insert Mode for that action only by holding down the shift key when you start the editing action. If the Insert Mode was "Overwrite", holding down the shift key will make it "Insert". Likewise, if the Insert Mode was "Insert", holding down the shift key will make it "Overwrite". When the shift key is used in this fashion the indicator in the status bar does not change.
See About Insert Modes for more information.