Select whole column content in pgAdmin

In PgAdmin.. If you want 'unlimited': File -> Options -> Query Tool -> Max. char. per column -> -1

Try set this value in PgAdmin config:

File > Options > Query Tool > Max. characters per column

Look on settings on this page

EDIT: For full column content you have to use -1, if left empty PgAdmin3 automatically replaces it with a 0 and nothing is shown but "...".