I second the toggle mode solution. I too am afraid to make unwanted changes without knowing it. This happens every now and then.
I would expect existing entries to open in view mode, with only formerly attached items (e.g. photo's) visible. And an option to toggle into edit mode.
New entries should (of course) open in edit mode.
In edit mode you would have all the available options like in the current version.
And an option to 'save' maybe.
I love this app btw. I use it for all kinds of stuff. Finding back things with the text search works like a charm.
I also love 'browsing the attachements' mode (photos). I find it a wonderfull way to walk back on Memory Lane.