Moving Horizontally Through Your Data
IGB has multiple different methods to allow you to move horizontally, and vertically, and explore your data. Each method has its advantages, so be sure to try them.
Horizontal Scroller
Use the horizontal scroller to move the display from left to right. The image below shows the horizontal scrollbar, with directional arrows at the end. To use the scroller, click-drag the thumb (red arrow, box) and move it left or right. Note however that when you are zoomed in, scrolling moves the display very quickly and you may lose track of the region you were viewing. The horizontal scroller works best when you're zoomed out on large regions.
To move short distances, click the icons on the right side of the scroller (blue arrow, box).
Click-drag
Click-drag the selection tool (orange box, arrow) to move in a more controlled fashion through the data. Click anywhere near the edge of the image. Keep the mouse pressed and drag the cursor (arrow icon) to the left or right. The display will continue moving at a steady pace for as long as the click-drag is held. This click-drag interaction is similar to the select-scrolling in many word processing programs, where you can select text and then, by continuing to select/drag the cursor up or down, you scroll through the document.
Grab-drag
Here, you select the Grab tool, hand icon (orange box, arrow), and click it within the display. Use it to drag the display in the direction you want to move.This is the opposite direction from click-drag movement, and can be more intuitive to some users. It also moves at the speed that the user moves the mouse, whereas click-drag moves at a steady pace. On the other hand, grab-drag can only move the image to the edge of the main window. You must re-grab to continue moving.
This form of movement can also be used to shift the image vertically if the vertical zoom is active.
After moving to an area of interest, you will need to change back to the Select tool (to the left of the Grab tool) in order to select annotations or elements within the image.
Auto Scroll
This is a very useful feature for scanning large regions at medium zoom levels. You set the speed of movement in milliseconds, and the amount of increment in pixels. IGB will move through the image, from left to right, at your speed. Alternatively, the amount of increment will be automatically set by the region in view; zoom in and the increment will be decreased, zoom out and the increment will be increased. Autoscroll can be accessed through the Tools menu. or through the Toolbar icons. The default icon is for turning Auto Scroll on and off. A second Toolbar icon is available to access the Auto Scroll configure window.