Keyboard navigation in ladder diagram
    Certain keys set focus on different ladder diagram elements and perform different tasks on the canvas of the Ladder Diagram Editor:
| Key | Description | 
|---|---|
| Tab | Sets focus on the next element on the canvas of the Ladder Diagram Editor. Tab sets focus on the rung, instruction, or branch to the right.  Tab does not set focus on branch levels or on parameter within an instruction.  In a complex branch,  Tabmoves from left to right and sets  focus on the next element that has the same logic as the rung. Tab navigates to the rung below when there are no more elements at the branch level. | 
| Shift+Tab | Sets focus on the previous element to the left on the canvas.  Shift + Tabsets focus on rungs, instructions, and branches. Shift + Tabdoes not set focus on branch levels. | 
| Arrow keyswhen focus is on an instruction | Sets focus on the next or previous item of the instruction. Items in an instruction include parameters, inputs, tags, and instruction types.  When focus is on an instruction parameter, select  Enter to edit the parameter. | 
| Up Arrowwhen a rung is in focus | Sets focus on the rung header of the previous rung. | 
| Down Arrowwhen a rung is in focus | Sets focus on the rung header of the next rung.  | 
| Up Arrowwhen a branch level is in focus | Sets focus on the previous branch level. | 
| Down Arrowwhen a branch level is in focus | Sets focus on the next branch level. | 
| Spacebar+Up Arrow | Sets focus on the rung header above the current rung. | 
| Spacebar+Down Arrow | Sets focus on the rung header below the current rung | 
| Ctrl+Home | Navigates to the beginning of the routine. | 
| Ctrl+End | Navigates to the end of the routine. | 
| Alt + Ctrl +B | Toggles the state of a Boolean tag between ON and OFF.  | 
| F2 | Inserts the insertion point in the parameter that has focus so that you can edit the parameter. | 
| Insert | Opens the Ladder Editor Toolbox when the Ladder Diagram Editor is open. | 
| Esc | Stops current input or removes focus from element. | 
| Delete | Deletes the selected element or value inside an input. | 
| Page Down | Displays the next view of ladder diagram. | 
| Page Up | Displays the previous view of ladder diagram. | 
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