Hi,
Kindly create an individual leave type setting to have a check box or function button to allow the respective leave application setting select either by hourly, half day or full day, especially for 'Time-Off' (or any other leave type).
This flexible function allows the creation of Leave Type that is based on respective company policy rather than restricted by hourly leave application that can only select 'Allow' or 'Not-Allow for all leave type in one selection .