Extend a line

[fishcad]

I just started with Qcad an hour ago. I am not having any luck with the forum to find the answer to two questions, so I apologize for asking what should be super simple questions.
1 - I cannot find an "Extend" option to make a line extend to another entity. Is that an option?
2 - I can only fillet two lines if I enter a radius other than "0". Is that just the way it is? I needed to fillet two lines so I entered 0.01" which is good enough for what I am doing.

[Husky]

Hi,

for a beginner it could be helpful to study the tutorial section below:
https://qcad.org/en/documentation/video-tutorials

Answer Question 1: Menu > Modify > "Trim"
Answer Question 2: Radius 0 would not be a fillet. Depending on what your goal is you can use tool Menu > Modify > "Trim both" or Menu > Modify > "Round".

[CVH]

For completeness:

'EXTEND' kinda implies extending .. 'Making longer'.
QCAD uses the more common term 'Trimming' while that may also mean 'making shorter'.

Adding a rounding with radius zero would result in a Null-Arc entity.
While Null-entities may have a mathematical meaning internally it is best to avoid the creation of such drawing entities.
Essentially an infinite small point with no start or end direction.
The main idea is that the arc is tangentially connected to both entities with defined start and end angles.

Modify .. Trim (RM) -> Online reference
Modify .. Trim Both (TM) -> Online reference
Modify .. Round (RN) -> Online reference
Modify .. Chamfer / Bevel (CH) -> Online reference

You can also look them up in the Offline reference under menu Help.

Regards,
CVH