In any time in the game, you can access your PDA. It is a kind of your own command center, from which you can learn a lot of useful info. To view the options available, activate your computer ([I] key as default).
In the first tab, you will receive information about the weather for the whole week, about finances and the news. Pay attention especially to the weather, as you won't be able to use your machines in rainy days. The news will inform you which store has announced an increase in the demand for a given product. In the finances tab, you can view all the income and outcome that influence your account.
In the next tab, you can view the status of your products, which are currently stored in the silo or the warehouse. You can also see the prices that the stores offer for certain goods and current trends. The price changes once every hour and sometimes the stores announce an increase in the demand for certain product, which is also shown in this tab. You will quickly notice that every store has a product for which he offers the highest price (for example, when selling your grain in the Windmill, you will earn the most). Before selling, you should always check who has the best offer at the moment.
The third tab informs you about the machines and tools you have. Here you can check where the machines currently are and switch to control any vehicle. The option of resetting a vehicle/tool will automatically move the machine onto your farm. It is useful mainly when some accident happens, like for example your Piqup crashing.
The next tab shows the whole map. The most important thing to see here are the fields. In this menu, you can check which fields are ready for sowing and which have already grown crops. Blue color (the darker it is, the sooner the harvest) marks those fields, which have already been sowed. Green color marks the ones that are ready to be harvested. Light blue marks the fields, from which you have to remove the leaves and red color is reserved for withered fields (you can only cultivate them now). By changing the view on the map, you can also see to what plants the status applies. Thanks to that, you can quickly decide what tools should be transported where, in order to perform all the necessary tasks.
There are two more tabs in your PDA. The fifth tab shows that status of all the animals you possess and tells you if there are any products ready to be collected (like eggs for example). This window allows you to control all the aspects connected to animal husbandry and react accordingly, by for example providing more food. The last tab shows the statistics of the gameplay - here you can view what you've accomplished so far and how much work is there still to do.