There are multiple ways to zoom and scroll through your chart.
Hold down CTRL-key while using the scroll wheel of your mouse to zoom.
Hold down the ALT-key while you press down your left mouse button at the same time to scroll.
Note: Pressing down the space bar has the same effect as using the ALT-key, but this works only when the cursor is hidden.
Go to the "View" menu and click "Zoom", which lets you zoom with a slider.
In the "View" menu, you can show or hide the scrollbars, which you can use to scroll.
On a Macbook, hold down CTRL-key while moving with two fingers on your touchpad to zoom.
Press the + or - key of your keyboard to zoom.
Hold down the ALT-key while pressing an arrow (cursor) key to scroll one square at a time.
Press the Page Down or Page Up key to scroll a half page up or down.
Hold down the ALT-key while pressing the Page Down or Page Up key to scroll half a page to the left or to the right.
Touch your display with two fingers and move toward each other or away from each other (pinch).
On a Macbook using Chrome, you can do the same touch gestures on your touchpad. This only works in Chrome.
Touch your display and hold down while moving around to scroll through your chart (pan).
On a Macbook, you can do the same touch gesture on your touchpad, but use two fingers at the same time (instead of one finger).
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