If you are using just your browser, click the edit icon in the left column. Formatted text appears with a button for opening the eRoom editor. Number fields have a text box that takes numbers only. Date fields have a box that you can edit directly or pick from a list of dates. Member fields appear with a button for opening the member selection dialog.
List fields have a list with the choices created for that list.
You also have a text box called Notes for you to enter notes to yourself about the entry. The note appears only in the editor, not on the page. You can edit several items in one session by using the Previous and Next buttons. When you click either button, eRoom saves the current entry and loads the data for the previous or next entry in the list. If you are at the beginning or end of the list when you click either button, the data for the current entry remains and you get an error message.