Adobe Photoshop is the leading pixel-based image editor on the market, and it's well-suited toward manipulation of charts, graphs and maps. When eniting a map, an essential part is the key, which often include a compass rose to indicate direction. If you're editing a map and need to rotate the compass rose to better indicate a real-world direction, you can use Photoshop's selection tools and keyboard shortcuts to do so quickly and accurately.
- Skill level:
- Moderately Easy
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Start Photoshop from the shortcut on your computer desktop, Start menu or OS X dock. Click "File," then "Open." Navigate to the picture of Photoshop document you want to modify and click "Open."
Click the layer that includes the compass rose in the "Layers" menu. Standard images that include JPEGs, BMPs, and GIFs have only one layer.
Click the Magic Wand tool in the left-hand toolbar. Click the centre of the compass rose. Hold down the "Shift" key on your keyboard and keep clicking different sections until the entire compass rose is selected. You can deselect by pressing "Ctrl+D," and change the sensitivity of the Magic Wand tool by raising or lowering the "Tolerance" value in the upper toolbar.
Press "Ctrl+T" to start the Transform tool. Hover your mouse over a corner until the rotate cursor appears -- a curved line with arrows at each end. Click and drag the cursor to rotate the compass rose. You can hold down the "Shift" button to rotate in exact increments of 15 degrees. Press "Enter" to close the Transform tool.
Click "File," then "Save." Your image or document is now saved with an adjusted compass rose.
Tips and warnings
- If you're working with a layered Photoshop document that has the compass rose in a seperate layer, you do not need to use any selection tools. Just click the layer that holds the rose and press "Ctrl+T" to start the Transform tool.
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