Map View

This is the main view in JOSM (called ​Viewport by experts, where editing takes place, and Bing/Mapbox and other sources can be displayed.

What do you see here and when

There several mechanisms in JOSM that affect what user sees in main screen.

Visibility

• Data can be filtered out by Filters
• Layers (data, imagery) can be hidden or semi-opaque
• Map Paint Styles can hide objects per zoom level

Appearance

• Partial fill of objects is enabled by default, it depends on area of the object.
• Enabled (in preferences) and activated (in Map Paint Styles window or preferences) styles affect what you see on the screen
• Styles can be displayed differently based on zoom factor

Move map

The area displayed in the window can be moved by holding down the right mouse button, and dragging the mouse. (On a Mac with a one-button mouse, simulate right-click by holding down Ctrl while clicking the button.)

Zoom

You can zoom using the scroll wheel or the Plus- and Minus-keys but there many alternative ways.

See also

• Select Action - help on selecting, moving, and rotating objects in the map view
• Modes - overview of modes (frequently accessed tools) in JOSM
• Status bar

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