Flameshot is a popular Screenshot manager for Linux. Installation in Trident Linux is very fast and simple - direcly from Trident's repo using xbps package manager:

$ sudo xbps-install flameshot

output:

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$ sudo xbps-install flameshot
Password: 

Name      Action    Version           New version            Download size
flameshot install   -                 0.6.0_2                241KB 

Size to download:              242KB
Size required on disk:         951KB
Space available on disk:       280GB

Do you want to continue? [Y/n] y

[*] Downloading packages
flameshot-0.6.0_2.x86_64.xbps.sig: 512B [avg rate: 7813KB/s]
flameshot-0.6.0_2.x86_64.xbps: 241KB [avg rate: 122KB/s]
flameshot-0.6.0_2: verifying RSA signature...

[*] Collecting package files
flameshot-0.6.0_2: collecting files...

[*] Unpacking packages
flameshot-0.6.0_2: unpacking ...

[*] Configuring unpacked packages
flameshot-0.6.0_2: configuring ...
Updating GTK+ icon cache for /usr/share/icons/hicolor...
Updating MIME database...
flameshot-0.6.0_2: installed successfully.

1 downloaded, 1 installed, 0 updated, 1 configured, 0 removed.