# Annotation tools

In the top-left of the annotator window you’ll find 15 tool-buttons.

The annotator has a range of simple graphical tools for annotating the image. Click on the above image to see the key-codes associated with those tools. At first glance these may seem confusing, however, they are just the position of the button translated to the corresponding position on a standard qwerty keyboard. These were chosen so that you can leave your left-hand on the keyboard and your right-hand on the mouse. So the middle 5 buttons are just the keys that lie under a left-hand on its home-row: a-s-d-f-g. The top 5 buttons are q-w-e-r-t, and the bottom 5 are z-x-c-v-b. Note that the keys are arranged in a similar manner but for the right-hand when you choose the left-hand mouse option on the marker window.

icon tool name key click shift-click ctrl-click
Pen tool t red-pen highlighter pen-with-arrows
Text tool g enter text
Line tool b line single-arrow double-arrow
Comment tool r previous comment on list
Comment tool f comment / next-comment
Comment tool v next comment on list
Cross tool e cross tick question-mark
Tick tool d tick cross question-mark
Box tool c box ellipse
Redo tool w redo
Undo tool s undo
Delete tool x delete / area-delete
Pan tool q pan view
Zoom tool a zoom in zoom out
Move tool z move object

Here we show a screenshot of the annotator in compact view with all the graphical elements shown.

Notice that fewer buttons are shown, but we now give a button for the delta-tool

 Delta tool 1,2,..,0 set delta

## Text tool

The text tool allows you to enter multiline text. Clicking onto the page-image either starts a new text-object, or edits an existing text object. The enter-key produces a newline, while shift-enter finishes the text-object.

If you start your text-object with tex: or TEX:, then when you complete the comment, Plom will run it through LaTeX. Note that you will still need to enclose mathematics with “” or “”.