I created a dashboard and added lookup tables, they are private. and I'm not seeing any options to change permission. please let me know how can I do this.
Settings > Lookups > Lookup definitions > Select Permission in front of your lookup
Settings > User Interface > Views > Select Permission in front of your dashboard
If you want to change permissions of lookups you should go to Settings -> Lookups -> Lookup Table Files. You will see a list of all your lookup table files. There is a tab named "Sharing" that will show the permissions for each lookup, and when you click at "Permissions" button you will be able to see the permissions menu.
If you wanna change permissions of a dashboard you can go to "Dashboards". You will see a list of your dashboards. Click Edit -> Edit Permissions.
Also, you should check if the role you are using has the permission to change permissions of all objects in Splunk.
Please find the below snippet. I'm not able to see the permission options. My lookup table is Domain_Data and there is no permission option shown here.
/usr/splunk0/splunk/etc/users/adcgrhh/bnym_fxr_srv/lookups/Domain_Data.csv adcgrhh bnym_fxr_srv Private Enabled Move | Delete
/usr/splunk0/splunk/etc/apps/search/lookups/GlobalExclusionList.csv xbbl6f9 Global | Permissions Enabled
Can you tell what role you are in? Does It have the capability to change permissions?
As the lookup is Private, if you are not the creator of this lookup, you will have to be an admin to change permissions for this object.