Yiska's Craft Guide:

<Note: you can only craft once you have chose what medium you want to craft (sword, artifact, martial, battle or armour) and recieved Core Alchemic Transmuter from the Core Alchemist in Port Lux at level 50>

Step 1:- Click 'C' and click the 'Prof. Craft' Tab and this is what you should see.

The highlighted section below shows your craft level. Between 1 ~ 7.

The highlighted section below shows which 4 versions of your medium you can craft.

The highlighted section below shows the grade of items you can craft.

Anything highlighted in orange you can craft and if you click on it it will show you what level and percentage is required to craft it.

<Note: Anything highlighted in red you cannot craft yet until you progress your craft by crafting>

Step 2:- Make sure you have all the materials you need.
The highlighted section below shows you the materials you need to craft an item. Anything highlighted in red you have'nt got and you need to get.

When you hover over the required weapon/other with your cursor, another window will pop up showing you exactly what type you need.

These windows ask for a specific craft especially when needing it for a proof item, therefore your crafted item has to match what it requires.

<Note: Of Proof is the item you need when you reach 100.0% of a craft level. After successfully crafting your proof item, take it to the Core Alchemist in Port Lux. Click 'quest' then 'I would like to level my craft'. The Alchemist will then give you an item, right click it and your craft will level up>

Step 3:- Once you have all your materials its time to craft. Click the arrow highlighted in the following image to select how many you would like to craft.
<Note: you need the amount of materials shown for each craft>

Once you have selected how many you want to craft click 'Item Craft' and wait for the bar to load.