Listed keyword lines can be selected by clicking on them with the mouse. A selected line can be deleted with the Delete button in the Edit menu, or may be edited with the Edit button in the same menu. In Edit, the user is prompted for the appropriate values in accord with syntax expected for that keyword line. A modified or deleted line can be recovered with the Undo button.
A new keyword line can be added by selecting one of the entries in the Keywords menu. The user is prompted for any values associated with the keyword. The addition (or replacement) can be undone with the Undo button.
When adding a keyword, redundant and inconsistent keywords that are already in the list, such as a previous instance of the keyword, are removed.
The Attributes menu allows extraction-related parameters that do not correspond to layers to be set. At present, there is only one such parameter:
Pressing the Device Block button produces a drop-down list of Device blocks from the technology file, plus three additional buttons: New, Delete, and Undelete. The Device blocks are listed in order of their definition, as the block name followed by the prefix, if any. Pressing New or any of the Device block name entries brings up a text editor loaded with the indicated block, or empty for New. The text for the Device block can be entered into the editor. Adding a block with the same name and prefix (or lack of a prefix) as an existing block will overwrite the existing block. Saving with the Save button in the editor will update an existing block or add a new block to the internal device list. The Save button in the editor does not save to disk. The Save Tech command can be used to generate a new technology file which will contain the new block, or the Save As button in the editor can be used to save the block as a file.
To delete a Device block, press the Delete button in the Device Block menu, then select a Device block from the same menu. That block will be removed from the menu. The name will disappear from the menu, and it is removed from consideration in extraction. The block can be restored with the Undelete menu entry, but only one deletion is remembered.
The syntax generated for keyword entries is exactly that used in the technology file. Each line contains a keyword plus any arguments. The keywords are described in 11.1.1.