Hi @Minu Murali welcome to the confluence cloud community and we are glad to answer your query.
If I understand your query, I believe you would like to give a border to the screenshot pasted in the confluence page? If yes, then please copy-paste the screen shot or an image in the page. The moment the picture is loaded, you would get default options: original, border, small and big arrows buttons etc. If you don't see them, click on the picture to see the tray. Choose "Border to apply".
Screenshot inline for your reference:
If my reply addressed your query, kindly upvote and mark "accept answer". This will benefit new members.
Hi @Minu Murali thank you for the screenshot. The image I posted is a little older version of Confluence which had the border option. However, in the latest version, the border options were removed.
Work around: At present one of the options available is to use the MS paint or Windows Snip & Sketch to format the screenshot >> add borders>> attach the image to confluence or Jira.
Listed is the ongoing Jira ticket with feedbacks from confluence users sharing their feedbacks on "border" option. If you are interested, please vote your opinion at: https://jira.atlassian.com/browse/CONFCLOUD-68220
If my answer addressed your query, please mark "accept the answer" in the original post.