Created attachment 123521 [details] an image from texStudio to show what is requested SUMMARY In the preview pane we can select a rectangle and it will zoom there. and we can zoom out by a right click. But a magnifier will be a better choice like what texstudio does. wherever we click and hold the button a magnifier should appear and show a zoomed circle around the mouse. like the picture in the attachment.
Yeah, it will be great to have a option to zoom. On the low resolution scale It is really hard to notice mistakes in subscripts or superscripts. Kindly add this feature.