How to make the theme support short code ?

Shortcode in WP is designed to work in post content, there are standard default shortcodes like [gallery] or [embed] that will always work out of the box. So it’s already enabled (for usage in post content), without users doing anything special.

but this theme when I try to add short code it doesn’t work. So have any idea on that?

I’ve just made a quick install of this theme and tested out gallery shortcoce [gallery], it works fine.

Despite, theme is old “hasn’t been updated in over 2 years”, still it supports shortcode in post content area which is a WP standard feature.

I use Post-in-Page plugin. that plugin have more short code. But when I use it doesn’t work, please help thans

Please post this in plugin specific forum.

Before doing so, be sure to read on the how to and its usage. Test it out in the default WP theme with no other plugins activated, making sure it’s really the plugin issue.