While on the page select the Settings menu button and editor
Tab will always open to tab 1 when the page opens. To change which tab is the active tab when the page opens, follow these steps.
Pageset = Core First
The whole page needs to be selected , To do so, select a button, then the edit and the (little arrow) and choose select parent. Select edit again and select parent. Do this two more times until the whole page is selected.
Select the red properties button.
Select the Actions area, in the search field type SetcurrentTab, select it
A window will open for you to select a screen object, select the tabView then the Green check mark Select
A dialog box appears with “enter expression for : value
Put the tab number you want in there and then select the green check mark to the right
Select Exit and Yes to save
Test your pages. Select a different topic and then go back to the one you modified to verify the tab you want is active when the page opens