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h2. Introduction

!att:_img_gen^axes_annotation_scalebar.png|border=1,width=800!
_Example of a scene with axes, annotation and scalebar_

Geographical grids, axes annotation, scalebars and text are natural display features when working out displays and presentation graphics. This chapter gives a brief documentation of the standard menus for text and annotation graphics in the system.
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*In this section:*
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h2. Geographical coordinates with axes

Use the command *Geographical coordinates* to display axes and coordinate annotation on a dataset.

!att:_img_gen^axes_annotation.png|width=900!

Geographical coordinates can be accessed as a command (found in *Shared Commands > Visualization*) or as a stand alone menu from *Tools > Geographical Management*. In either case the rules for a correct display is the same.

* Push *Default display* (older version only *Display*) under *Default display* to see the default values.
* Type in *Longitude/Latitude start*, *Long/Lat increment* and *Longitude/Latitude stop* values to set a custom geographical grid.
* Push *Display* or *Execute* to display geographical coordinates using the Lat / Lon values.
* To get a nice placement of the annotation numbers use the tuning in *Adjust annotation numbers*.

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Sometimes it may be useful to create an item command that will save your settings for a specific dataset. This will save you time next time you want to display axes over the same area. Read more about [creating item commands|Customizing the Interface#Creating item commands].
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h4. A simple guide on how to achieve a good display
The geographical axes display will be within the graphical window. To see the graphical window push the *Draw Frame* icon !att:_img_icon^draw_frame.png! on the toolbar.

# Make sure you have scaled to the dataset you want to display together with the axes.
# Check that the correct *coordinate system* is set under the *Coordinates* page.
# Go to get a *Default display*  section and click *Display*.
	
Sometimes the algorithm get a good display, but normally the user must edit the settings in the *Detailed display* section.
	
# Push *Update detailed* to get the Lat / Lon values into the number fields.
# Adjust them and click *Display* to see the changes.

Continue this process until you have achieved a satisfactory result.

h2. Scale bar

To display a scale bar open *Tools > Scalebar display*

!att:_img_gen^scalebar.png|width=700!


* Push *Draw Scalebar* to display the scalebar in default position and appearance.
* To place the scalebar at specific position:
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# Set the screen in 2D mode.
# Tick the box *Use XYZ coordinates*
# Click in the graphic window where you want to place the scalebar.
# Click *Update cursor to world coordinates* to get the cursor coordinates.
# Redisplay scalebar by pushing *Draw Scalebar*
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The default scalebar display will be within the graphical window and the drawing size is related to that window. To see the graphical window push the *Draw Frame* icon !att:_img_icon^draw_frame.png! on the toolbar.

h2. Text annotation

The *Three dimensional text* command lets you create text annotation anywhere in the graphical window. You can create 2D or 3D text, display the text in any angle or stick the text to a surface. All these things can be found out whith a little test and trying. When everything is fine save the command object. Optionally save it as an *Item command* or copy a present CO so you work with and save a copy of the command object.

!att:_img_gen^annotation.png|width=900!


h4. A guide on drawing a text at an angle along a line.

# Write in the desired text in the *text field*.
# Set the screen in 2D mode and create two cursor positions:
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# First cursor position: *at end of text*
# Second cursor position: *at start of text*
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# If the screen is in 3D mode use *y* to attach the cursor point to a surface.
# Push *Update cursor to coordinates*.
# Push *Update dip and azimuth*. *Azimuth* is for rotation around z axes. *Dip* is for 3D mode.
# Check in the *Dip* and *Azimuth* boxes.
# Select text attributes.
# Push *Execute* to display the text.

With a little training one can place text at any angle and position.

!att:_img_gen^geocoord2.png|width=400!
_Example figure with geo grid, scale bar end 3D text_


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