30. An article of manufacture comprising computer-readable instructions thereon for facilitating navigation of previously presented screen data in an ongoing online meeting, the article of manufacture comprising: instructions to store, in computer memory, screen data representing a previously presented portion of an ongoing online meeting; instructions to capture, in response to a trigger event, a screenshot of the screen data for the ongoing online meeting; instructions to cause the display, on a viewer computing device while the ongoing online meeting is still ongoing, of an image thumbnail generated from the screenshot, the image thumbnail facilitating navigation, on the viewer computing device, of the previously presented portion of the ongoing online meeting; instructions to receive, at the viewer computing device while the ongoing online meeting is still ongoing, a selection of the image thumbnail; and instructions to cause the display, in response to the selection of the image thumbnail, on the viewer computing device, simultaneously and while the ongoing online meeting is still ongoing, first screen data corresponding to a currently presented portion of the ongoing online meeting and second screen data corresponding to the screenshot, wherein the first screen data is presented picture-in-picture inside the second screen data or the second screen data is presented picture-in-picture inside the first screen data; wherein the trigger event comprises a size of an accumulative bounding box encapsulating changes to the stored screen data increasing past a threshold.
30. An article of manufacture comprising computer-readable instructions thereon for facilitating navigation of previously presented screen data in an ongoing online meeting, the article of manufacture comprising: instructions to store, in computer memory, screen data representing a previously presented portion of an ongoing online meeting; instructions to capture, in response to a trigger event, a screenshot of the screen data for the ongoing online meeting; instructions to cause the display, on a viewer computing device while the ongoing online meeting is still ongoing, of an image thumbnail generated from the screenshot, the image thumbnail facilitating navigation, on the viewer computing device, of the previously presented portion of the ongoing online meeting; instructions to receive, at the viewer computing device while the ongoing online meeting is still ongoing, a selection of the image thumbnail; and instructions to cause the display, in response to the selection of the image thumbnail, on the viewer computing device, simultaneously and while the ongoing online meeting is still ongoing, first screen data corresponding to a currently presented portion of the ongoing online meeting and second screen data corresponding to the screenshot, wherein the first screen data is presented picture-in-picture inside the second screen data or the second screen data is presented picture-in-picture inside the first screen data; wherein the trigger event comprises a size of an accumulative bounding box encapsulating changes to the stored screen data increasing past a threshold. 40. The article of manufacture of claim 30 , further comprising instructions to suppress the capture of a second screenshot if a second trigger event occurs too close in time to a first trigger event.