In Clock Song Constraints, a precise condition - or constraint - can be defined for an individual Clock Song position. It is used to specify that a particular Attribute (including Themes), and a Value for that Attribute, must be either scheduled or avoided for a selected position, and it can also limit a the range of available Songs for this position to a range greater or less than a Scalar Attribute value. This window lists all existing Song Constraints, and can be used to Add, Edit or Delete Song Constraints. Adding or Editing song constraints is done using the Edit Clock Constraints window. There an Attribute is specified, then a Value for that Attribute which instructs GSelector to match, or avoid Scalar Attributes, exceed or undershoot that Attribute value.
Clock Song Constraints, once defined, are applied to positions in individual clocks in the Clock Definition window.
NOTE: When working with Slotted Categories, defined in the Category Group Importance window, Clock Song Constraints are ignored.
See also the notes for the Edit Clock Constraints window. Note that you can also apply constraints to Links in the Clock Constraints for Links window.
Click the Navigation Bar Clocks tab to open the default Clocks Definition window, or from the Clock Assignment Grid, select any Clock, and double-click to open the Clocks Definition window for that Clock, or from the Editor, double-click on an hour Header to open that Hour's current Clock in the Clock Definition window. Then click the Constraints tab, and finally the Songs tab to access a window similar to this image.
Click any area in the image for help
Click any area in the image for help
The Toolbar allows the user to create or edit a new Constraint , or to delete an existing constraint, and to save or cancel any changes.
Pressing the CTRL+F will open the Find option allowing the user to do a "Smart Filter" find. The Finder will search for results as they are typed. To open the Find option click the Song Constraint List pane to search and press the CTRL+F keys on the keyboard.
CTRL+F - Invokes the Find Panel.
ESC - Clears the search box. If the search box is empty, pressing ESC closes the Find Panel.
DOWN ARROW - Moves focus from the Find Panel to the grid's data area.
After a Constraint has been created, it is listed here. A Constraint that has been assigned to at least one Clock Song position is indicated by a checkmark in the Assigned column. To edit an existing Constraint, click to select the Song Constraint, then double-click or click the Edit button.
Editing an existing Song Constraint
Using Themes with Song Constraints
In the Clock Song Constraints window toolbar, click the Add Song Constraint 
button or press the Ins key on your keyboard to access a blank Edit Song Constraint window.
In the Clock Song Constraints window toolbar, first select the Song Constraint to edit in the Clock Song Constraints window Song Constraints list , then double-click or click the Edit 
button to open the Edit Song Constraint window, displaying the current details for the selected Song Constraint.
First select the Song Constraint to delete in the Clock Song Constraints window Song Constraints list, then click the toolbar Delete 
button or press the Del key on your keyboard to delete the Song Constraint.
NOTE: If a Song Constraint is assigned to one or more clock positions, you will be asked to confirm that you are deleting the Song Constraint from all clocks.
Click the Save 
button to confirm your changes. You will be prompted to confirm the changes when leaving the Clock Song Constraint tab window.
Click the Cancel 
button to re-read the original settings and return to the window to its last saved state.
The Edit Clock Song Constraints window allows you to block or specifically call for Songs by Theme. Note that you can call for Songs by Theme in any position, by selecting a Theme Song position. This facility, however, also allows you to block Songs by a specific Theme in a specific Clock position, and to call for (or block) Songs by Theme when scheduling from a specific Category Group in a Category Group Song position.