@SinaSoheili ,
Assuming those are the screen names (you did not give me the field name), but assuming the name ScreenName, OnSelect of the Gallery (you need to substitute your gallery and screen names)
Navigate(
Switch(
YourGalleryName.Selelected.ScreenName,
"Title",
YourTitleScreenName,
"Description",
YourDescriptionScreenName,
"Image",
YourImageScreenName,
"Target",
YourTargetScreenName
)
)
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