Lost the Search capability in DAB

Dictionary App Builder
1

LS. The magnifier glass for searching in the top right corner has disappeared. I probably set it to somewhere, but I cannot find where to activate searching the app.
Thanks in advance for showing the way!
Bart

2

I found the awnser. In the .appdef file there is a section where search can be turned on or off :

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It cannot be set from within DAB.