Magnifying the Image

Mira provides several ways to magnify a displayed image. Here, magnifying the image refers to zooming the pixel display on the screen, not to changing the image scale on the pixel array, which involves resampling the pixel data (see, e.g., the Scale Image command).

Below, the first 2 methods magnify the image about the location of the mouse pointer. The last 2 methods magnify relative to the window.

Magnifying the Image about a Target Point

These methods use the (magnify) button on the Image Toolbar to magnify the image at the location of the pointer. This keeps the image centered at the location of the mouse pointer provided the image fills the window. However, if the image is smaller than the window, the center position will be changed.

Using the Magnify Button

This method is available only when the Image Toolbar is open in the Image Window. If you hover the mouse over the button, a tooltip will open showing the current magnification. To change the magnification, use the procedure below:

Click on theImage Toolbar to enter "magnify mode". Then:
Point the mouse at the new center of magnification. Then
To Enlarge: Click the left button.
To Shrink: Hold down the [Shift] key and click the left mouse button.
To leave magnify mode, enter another mode. For example, click on the Image Toolbar to switch to Roam Mode in which no mouse command modes are active.

Using the Mouse Thumbwheel

This method requires a mouse having a thumbwheel or a mouse pad having thumbwheel emulation.

In any command mode, point the mouse at the image where you want to center the magnification or demagnification.
To Enlarge: Rotate the thumbwheel forward.
To Shrink: Rotate the thumbwheel backward.

Magnifying Relative to the Window Corner

The following methods magnify the image relative to the Image Window so that magnifying the image shifts it relative to the top left corner. In general, this changes the centering in the window.

Using the Magnify Menus

This method is available only when the Image Toolbar is open in the Image Window.

Right-click on the Image Toolbar to open the Magnify menu.
Select the desired scale from the menu as shown above.

View Menu for Image Windows

On the menu at the top of the Mira application window, click the View > Magnify command to open a menu similar to the one above..
Select the magnification from the menu.

Magnify Menu of Image Context menu

Right click on the image to open the Image Context Menu.
Select the Magnify menu,
Select the magnification setting from the menu.