**How to reproduce:**
Compose new email or answer email, try to add recipient from address book
**Actual results:**
Several of my subjects had **big difficulties to add a recipient whose email address was in the address book.**
This means that they searched very long for the function/button and tried out various buttons (see screenshots):
**First thing** they did was to **try adding the recipient by clicking on the „+“ button next to the recipient line** - but this only offers the options CC, BCC etc. They **then tried to click on „contacts“ in the navigation column on the left** but this would mean leaving the currently open email and thus they had to break this off. They **then tried to use the „To+“ etc. buttons in the lower left corner**.
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Both of the subjects I refer to **finally added the recipient by double-clicking on corresponding contact in the „contacts“ button in the column on the left** (not the navigation column, but the second column from the left) - but it took them quite some time to find this button.
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**Expected results:**
Apart from auto-complete there **should be an intuitive way to add a recipient from an address book**.
Since participants first of all tried to use the „+“ button for this, it might the best thing to **add another „+“ button** next to the existing one (like we also have a drop-down-arrow //and// a pen to edit the sender in the line above): Ideally, the different functions of the two + buttons will be understood immediately; for this purpose you could make the second + button a **+ with the head of a person next to it**, like the buttons „To+“ etc., which **makes clear that this refers to adding //contacts//!**