When a card is selected the period time times should be shown
When a card is selected the period time times should be shown at the bottom of the screen along with the other details of that card.
The details of the last selected card (or the currently mouse overed card if there is no selection) are displayed in the bottom left corner (status bar). As you move the mouse cursor over the timetable, the related day, period and resource names will be shaded to show you the exact position. In the case of lots of periods you can horizontally zoom in so it’s pretty easy to see period time where the cards/cursor is and there is no need to duplicate information on the screen: https://primetimetable.com/help/#zoom&q