| Unit: | SDL_thumbnails |
| Class: |
TThumbnails |
| Declaration: |
property FirstThumbIdx: double; |
The property FirstThumbIdx has two functions: while the integer part controls which slide is displayed at the top left of the thumbnail panel, the decimal fraction determines the vertical fractional shift of the entire slide arrangement.
| Hint: |
Please note that the slides are always arranged in a way that slides do no change columns (in the case of multiple columns of thumbnail images) when scrolling through a slide collection, i.e. the number of horizontal slides (property NumSlidesHoriz) is automatically taken into account. This feature allows to scroll smoothly through a thumbnail collection, simply by assigning a fraction of the current scrollbar position to the property FirstThumbIdx.
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GuiPack 
