Double click on the text item in the borehole view (or select the text block from "Edit Block Items" drop down menu in the Property Manager) and the Text Editor will appear for that text item. Highlight the text you want to appear bold and change the formatting.
Alternatively, you could include math text in the data table to indicate formatting. You can change typefaces, sizes, styles and colors and insert special characters or the date and time. The only math text instructions that won’t work for text logs is the \rp and \sp positioning commands.
Updated: October 6, 2016