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## Power scrolling preferences

The power scroll preferences specify whether to enable power scrolling, which enables you to quickly scroll through large multi-slice series. In addition, you can specify the following settings:

| • | Whether the scrolling speed is determined by how fast you move the mouse, or the location of the mouse pointer

| • | How to start power scrolling

| • | The direction to scroll through a series

For details on using power scrolling, see Moving through a series using power scrolling.

Steps for this task

To set power scrolling preferences:

| 1. | Click the Preferences icon on the main toolbar.

The Preferences dialog box is displayed.

| 2. | Select Power Scrolling in the left pane. The Power Scrolling preferences are listed on the right.

| 3. | Specify whether to enable power scrolling.

To... | Do this...
--- | ---
Enable power scrolling |
| • | Select the Enable check box.
Disable power scrolling |
| • | Clear the Enable check box.

| 4. | If power scrolling is enabled, set the Power Scroll Mode, which specifies how the scrolling speed is determined:

If... | Then...
--- | ---
Scrolling speed depends on how fast you move the mouse |
| • | Click Proportional.
Scrolling speed depends on the location of the mouser pointer |
| • | Click Velocity.

| 5. | If power scrolling is enabled, set the Mouse Control, which specifies how to start power scrolling:

To... | Do this...
--- | ---
Start power scrolling by holding down the mouse wheel or middle mouse button |
| • | Click Mouse Drag.
Start power scrolling by clicking the mouse wheel or middle mouse button |
| • | Click Mouse Click.

| 6. | If power scrolling is enabled, set the Scroll Orientation, which specifies the power scroll direction:

To... | Do this...
--- | ---
Scroll by moving the mouse up and down |
| • | Click Vertical.
Scroll by moving the mouse left and right |
| • | Click Horizontal.

| 7. | Do one of the following:

| • | To apply the preferences, click Apply.

| • | To apply the preferences and close the Preferences dialog box, click OK.

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