Computing technologies for screensharing

A system comprising:

• a non-transitory computing instance programmed to:
• present a first screen in a first viewport of a first application program operated by a first user profile from a first computing terminal to receive an attribute for a web conferencing session with a second application program including a second viewport operated by a second user profile from a second computing terminal, wherein the first user profile is more privileged than the second user profile with respect to the web conferencing session;
• present a second screen in the first viewport responsive to receiving the attribute, wherein the second screen includes a first area, a second area, and a bounding box such that the first area is positioned outside the bounding box, the second area is positioned inside the bounding box, and the first area and the second area completely define the second screen, wherein the first area contains a first user input element and a second user input element, wherein the first user input element is programmed to receive a selection of a content to be presented in the second area, wherein the second user input element is programmed to receive a command controlling the web conferencing session;
• and
• present a third screen in the first viewport based on receiving the command such that (1) the web conferencing session is started based on the attribute and the command, (2) the third screen presents the first area and the second area completely defining the third screen during the web conferencing session, (3) the second area presents the content based on the selection during the web conferencing session, and (4) the first application program screenshares the second area with the second application program during the web conferencing session such that the second viewport presents a fourth screen mirroring the second area in the first viewport containing the content being controlled based on the selection during the web conferencing session and not presenting the first area in the fourth screen during the web conferencing session.