To have a database in which only teachers can add entries, but students can view the entries. Go to databse. Then click on Permissions link in the settings under Database activity administration. Remo...
There is currently no user interface for deleting a file attached to a database entry, however possible way is to delete the entry completely and then create a new entry without attaching the file....
Set up the database so that entries require approval. If the entries are never approved, then only, the student that added a particular entry and the teachers, can view it....
There is one default preset, Image gallery. It is possible to create your oown presets. When you have created your database that you desire to set as a preset: Go to the "Presets" tab of the database....