Yes you can limit the columns to search on by simply doing the following:

Navigate to a column that you don’t want to the user to be able to search on, for example the EMPNO column.

Under the column properties scroll down to Enable Users To and turn off the Filter property. This will remove this column from the available list of columns to search through.

When you save and run the page you will notice that the EMPNO column no longer appears in the searchable list of columns under the magnifying glass.

Now, even with the default selection of All Columns, the search field will only search on the ENAME column.

Hope this helps!

First Add the following to CSS > Inline under Page settings:

@media only screen and (min-width: 600px) {
  .right-border{
    border-right: 5px solid red;
  }
}

Finally add the above class (right-border) to the Column CSS Classes property to your region on the left.

You can change the CSS style according to how you would like it.