In ver.7.x, the maximum number of values that can be displayed in the Drop-down list of Property control is 10.
If the number of values exceeds 10, the user must use the scroll bar to see the hidden value.
In ver.6.5, the maximum number of values that can be displayed in the Drop-down list of Property control is 30, users of Ver.6.5 often were able to select values more efficiently.
In order to allow users to select values efficiently, I think it would be nice to allow property control authors to choose the maximum number of values that can be displayed in the Drop-down list.