Locked Items
The WORLD is a unique frame that exists in every SA file and defines the base coordinate system for the job file. Either deleting or moving this World frame can result in both confusion and unforeseen problems. For that reason its properties are locked by default and are not directly accessible. In addition, efforts to move or rename this frame will result in a new World frame being build for you automatically.
If for some reason the World frame must be edited or renamed an option exists on the Display tab of the Users Options to either disable this function or adjust the name of the locked frame.
In addition to the World frame, many other object types can be locked such that their position within the job cannot be edited. Locked only means entity cannot be spatially moved – all other existing operations allowed. These include:
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Imported Surfaces - which are locked automatically
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Instruments can be locked
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SA objects not yet associated with instruments can be locked.
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Points not yet associated with instruments can be also be locked.
The item lock status can be edited using the command Item Properties>Control Item Lock Status (or under the Edit menu). Locked items will use a lock icon in the SA Treebar to indicate their current status: