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    <p>Yes <code>---</code> is a valid <code>PICTURE</code> clause. The variable corresponding to this <code>PICTURE</code> will accept assignments of numeric values in the range -99 through to +99. It cannot be assigned non-numerics (space for example). However, if you were to <code>DISPLAY</code> this variable after assigning a numeric value to it, leading zeros will be replaced by spaces. Consequently, if you <code>MOVE ZERO</code> to this item it will <code>DISPLAY</code> only spaces. Attempting to <code>MOVE SPACES</code> to this item will result in a compile error (incompatible data types). This last bit may seem a little counter intutive, but remember that this type of <code>PICTURE</code> clause implies a <code>USAGE</code> of display - basically items defined in this manner are used to 'pretty print' numbers. About the only operations you can preform with <code>USAGE DISPLAY</code> items is <code>MOVE</code> to or from and <code>DISPLAY</code> them.</p> <p><strong>EDIT - Response to Comment</strong></p> <p>A <code>PICTURE</code> of <code>---X(2)</code> is invalid. The chart below illustrates combinations and the order that symbols may appear in a <code>PICTURE</code> string. Notice that parenthesis are not in the chart. Logically you can replace them with the corresponding number of occurences of the preceding character before reading the string. For example <code>X(3)</code> is read as <code>XXX</code>. If you really want to parse out a <code>PICTURE</code> string properly, you can use this chart to construct a BNF grammar specifically for them.</p> <p><img src="https://i.stack.imgur.com/fJN3r.gif" alt="enter image description here"></p>
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    1. COThanks @NealB. So I take it you can't mix a numeric display like --- and X(2) so you have ---X(2)? Would that be valid? Thanks :)
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    2. CO@Decrypter See edited answer...
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