Digital oscilloscope trace appears dim

[123mmm]

Hello. I use an GW Instek GDS1102B oscilloscope to test my circuits. The measured waveform looks dim (DSO001.png) if I select sample mode from the aquire menu, but when I select average mode (2) from the same menu then the measured waveform (DSO002.png) looks like higher intensity.
If I select a smaller record length, for example 1000 points then the waveform looks more dim (DSO003.png).

It is possible to make the waveform to look more intense when using sample mode ?

 

[danadak]

Why is the trace on my DSO displaying faintly (too light) at longer sweep rates?

I am using a Rigol DS2102 (DS2000 series) DSO to monitor clock output on a microcontroller. For whatever reason, the trace intensity becomes very faint at 200ms/division sweep rates and longer. I've

electronics.stackexchange.com

Best explanation I have seen.