1. In the normal profile mode, where we look sideways at the sessile drop, the FTA200 software 首ld work automatically down to 10° without normal care and down to 5° with special care. Around 5 degrees, one gets "glare" across the top of the drop which confuses automatic analysis. The drop no longer appears as a silhouette against the backlight. 2. Manual analysis, where the user clicks on the drop profile to locate it and the baseline, allows analysis down to, say, 3°