How to customize the width of textbox

[nongball]

How to customize the width of textbox?

Can someone help me?

[clint]

It requires manually editing the editviewdefs.php file.

Example:
1) Create a new custom TextArea field in the Opportunities module.
2) Add the custom field to the EditView and the DetailView layouts by adding a new row to the bottom of the layouts and then dropping the field onto the screen. NOTE: Be sure to remove the second filler field from the new row you added so that the new custom field will span across the two columns.
3) Save and deploy the changes to both layouts.
4) Now open in a text editor the new file custom/modules/Opportunities/metadata/editviewdefs.php.
5) Find the Comments field definition and modify it to include the new displayParams parameter below:

  array (
     'name' => 'comments_c',
     'label' => 'LBL_COMMENTS',
     'displayParams'=>array('rows'=>20, 'cols'=>80, 'maxlength'=>350),
  ), 
  

[nongball]

I want to decrease the width of the textfield in the searchform area (not custom field)

[clint]

Same basic idea. Modify the searchdefs.php file and add in this parameter to the definition of the field whose size you want to change.
'displayParams'=>array('size'=>10,),