Easy request: could you enlarge the field "notes" (I am not sure about what is the label in English version, in Spanish version it is "Memoria").
This is included in the second tab of the transactions, where only "add image" is included, so there is a lot of space to increase the height of the text field :)
In the English version we've named it Memo. You can do this via Settings > Transaction layout. There are three sizes to choose from 4, 6 and 8 visible lines. Note that you can also move the field to the first page if you prefer so.