You are wanting to change the display for negative numbers so as to put the brackets around the negative numbers. You can select
the column or specific cells and follow below steps:
Right click the selected cells / column and
chooseFormat Cells from
the context menu;
In the Format Cells dialog box, under Number tab,
click Number option,
and then choose the decimal places as you need;
And then click (1234) in theNegative numbers list box;
Then click OK to
close this dialog, and the selected negative numbers have been displayed around brackets.
You can display Bold in a similar manner - In
the Format Cells dialog
box, under Fonttab, click
Font Styleoption, select
Bold.
You may refer below link for further details and images:
https://www.extendoffice.com/documents/excel/1953-excel-display-negative-numbers-in-brackets.html
Regards,
Amit Tandon
www.globaliconnect.com