user20622: In Kdenlive's render settings I can choose the option to render "selected zone".
How do I select the zone? 
"Shift + left click" enables a box selection. However it only selects whole clips, so this approach does not work.

user32979: another approach that uses mouse is:
https://imgur.com/a/GtYMtRq
in other words, when you only need to adjust the zone out, you can drag this UI element or drag the middle.
Sorry, I cannot make the mini video viewable inline.

user20622: Use the keys "i" for "start" and "o" for "end" to create the selection. They use the current frame position.

Example:
Move the playhead to frame 190 and press "i". Move it to 390 and press "o".
This creates a selection with beginning at the frame 190 and end at 390. 

20622: <p>In Kdenlive's render settings I can choose the option to render "selected zone".</p>

<p>How do I select the zone? </p>

<p>"Shift + left click" enables a box selection. However it only selects whole clips, so this approach does not work.</p>
 32979: <p>another approach that uses mouse is:</p>
<p><a href="https://imgur.com/a/GtYMtRq" rel="nofollow noreferrer">https://imgur.com/a/GtYMtRq</a></p>
<p>in other words, when you only need to adjust the zone out, you can drag this UI element or drag the middle.</p>
<p>Sorry, I cannot make the mini video viewable inline.</p>
 20622: <p>Use the keys "i" for "start" and "o" for "end" to create the selection. They use the current frame position.</p>

<hr>

<p>Example:</p>

<p>Move the playhead to frame 190 and press "i". Move it to 390 and press "o".</p>

<p>This creates a selection with beginning at the frame 190 and end at 390. </p>
