As an alternative to buttons, interface pages can also be opened via an Avio channel, i.e. remotely controlled.
Every Wings Touch project has the port Project Values which contains two channels:
Active Page ID Get ...always has the page ID of the currently displayed page.
Active Page ID Set ...displays a page when its page ID is set as value.
The page ID can be displayed by mousing over the page port in Avio Manager. Following this the port info is shown. The relevant value is the Port Address value.
If you want open a page via a timeline in Wings Platinum you need to create a 
Value Out variable (don’t forget to checkmark 
Avio) and link it up with a short data or switch object which you placed at the corresponding timeline location before. Via a Smart connection you connect this variable with channel Active Page ID Set in Avio Manager. The best solution would be to use the Wizard and select Set If in the template list. For Result 1 you enter the Page ID, e.g. 90 and for Condition 1 you enter source>=500000000. The resulting formula in the connection is then setIf(90,source>=500000000)
See also
Connecting and editing channels