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Opens the SIMetrix help system.
| Help [/file <filename>] /contents | /context <context-id> | <topic> | 
| /contents | Opens help in main contents page | 
| /context | Included only for backward compatibility. 'Help /context id' does the same as 'Help id' | 
| /file | If specified, help will be obtained from filename . Otherwise help file will be SIMetrix.chm | 
| topic | If specified, help system will display page relating to topic . If topic does not exist, a list of available topics will be displayed. | 
To display help on the .TRAN simulator directive type:
| Help .tran | 
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