From your BackOffice, go to System Options and open the Symbols Settings tab, double click on the desired symbol to Edit it and go to source tab.

• Double click on the current source, write the new source then ok and save.
• To edit the source, right click and choose edit source, make your modification then save.
• To delete any source, right click then delete source and ok.
• To add more than one source, right click on source taband add new source,write the source and in the time fields fill the desired time that you want to activate this source in it.

Note that every source must have a unique period.