Export to pdf not showing columns morethan 5 in angularjs uigrid -

i want generate pdf columns exceeding table border,i may morethan 5 columns till 15 columns, way 15 columns in 1 sheet pdf, , gave exporterpdforientation: 'portrait', exporterpdfpagesize: 'letter', exporterpdfmaxgridwidth: 500,

this sample plunker sample plunker

change 'portrait' 'landscape'