Manually Adding opening balance in wave during transfer from another software

DineshSitapara

dear developer,
how can i add opening balance in wave manually .. because i recently transfer from another software and i have all closing balace (balance Sheet) in pdf format but how can i add them in manaually.. and also suggest me that how can i maintain my inventory records in wave.. in case of share trading business... suggest me .. wave is best for small business. thanks in advance.. and thank you for previous reply...