I think, that SD3 is not a construction kit. This could be curse or blessing. There is a lot of software at the market, to build sites with a "construction kit". This is sometimes useful, sometimes not. If you want to do it "right", you have to spend time with foundation, bootstrap or grid builder. If you`ve understood the lessons, you´re able to use these softwares like a wonderful tool. I´m using SD3 with bootstrap to build my templates for Impresspages CMS (but sadly I´ve not enough time, because my days aren´t long enough.
So, feel free, what kind of software you´ll choose.
Regards
Uwe

My first Materialize building block launched today: https://eikweb.com/sharing/roundabout/index.html ...

Hi Inger
Very nice Work love your dedication to the Coffee Cup community .
Regards Adrian

Most professional website designers have received some education / training on the subject (design) and have professional website builders build their website. The least an amateur can do is try to understand, learn and master the basic principles of designing and / or building websites and carefully choose and master the tools he/she is using.
Site Designer is a pretty nice tool for building a website but is not a LEGO construction kit clone. It does not come with a myriad of construction blocks. Like other members have said before: you have to build your own website parts or copy parts from others.
It gives you however options for saving and reuse of subassemblies - called - objects (parts of a previously built website).
If you want to build a near-professional website you still need at least:

functional design
graphical design
usability design
select a tool for building (SD V3 in our case)
master the building tool

Seems to me you like to take a lot of shortcuts, but this is not how it works.
No matter how many times you complain about it and ask for your all-inclusive design and construction box. Site Designer is what it is.