(9) Empty the whiteboard
Click to clear the whiteboard content.
(10) Board eraser
Touch the whiteboard area is greater than or equal to the thresh-
old, which can wipe out the content entirely.
(11) Page preview
1. Open the page preview popup window: Click to
display the current page as selected;
2. Add page: Click the icon to add the page;
3. Delete page: In the open page preview window, click
to delete button in the upper right corner of the page thumb-
nail to delete the page or delete button at the bottom of
the page preview window to delete all pages;
4. Turning page function: Click the left and right
page turning buttons and icons to achieve the page turning
effect, or in the page preview window,If the preview page
exceeds the limited preview range, slide up and down to quickly
find the page, click to select, as if flipping the pages.
2.2 Annotation
Click the annotation icon in the pull-up menu to open the comment for writing
。
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