How to post on Instagram from desktop :
1. First click on the + (plus) icon on the top right corner of the webpage.
2. Select an image from their macOS or Windows PCs, just as you do on the Android and iOS apps. Once selected, users will have to see Alongside, users also get the option to adjust brightness, contrast, saturation, temperature, fade, and vignette.
While posting the video, the steps changes slightly, after selecting the desired video, users can select any frame from the video as the cover. Users also get a toggle for turning the sound off or on.
Once a user has finished editing their photos or videos, they can then add a caption, location, and alt text. Other Instagram users can be tagged in the posts by clicking on the photo. Users also have the option to turn off commenting on their post before they publish it.
ect from four different crop sizes - Original, Square (1:1), Portrait (4:5), and Landscape (16:9). After that, the platform also gives the users the option to select a filter from the wide variety offered by the platform.
Source : freepressjournal