Frequent logins required on Chromebook

[fredw]

I'm a fairly new poster and have been surprised about how often I have to login when I'm on the OB. The other day I was trying out uploading photos and creating a gallery. I'm using a chromebook and had my photos in a tab, the OB in a tab and a photo editor\resizer in another and I was switching back and forth a lot and it seemed I was constantly logging in. I figured the switching tab logout is security related. Even without switching tabs it seemed to time out and logout if I was inactive too long.
So, is this behavior normal and necessary? Are there settings that could be adjusted or do I need to live with it and change my browsing behavior. Any suggestions would be appreciated. Thanks.

Appended info: I was logged in when I started writing this post and when I was done and hit the post button I was informed that I was not logged in. so I re-logged in and something weird happened and lost the post and had to restart the OB. I re-logged in and rewrote the post and hit the post button and once again I was not logged in. At least this time the re-login worked. Ill find out in a minute if I can save these changes. New Edit: Nope, had to re-login to save changes.